400520000

素因数分解:

$2^6\times 5^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:99

約数の個数: 280

約数和(自身を含む): 1142634240

約数和(自身を除く): 742114240

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 25, 31, 32, 34, 38, 40, 50, 62, 64, 68, 76, 80, 85, 95, 100, 124, 125, 136, 152, 155, 160, 170, 190, 200, 248, 250, 272, 304, 310, 320, 323, 340, 380, 400, 425, 475, 496, 500, 527, 544, 589, 608, 620, 625, 646, 680, 760, 775, 800, 850, 950, 992, 1000, 1054, 1088, 1178, 1216, 1240, 1250, 1292, 1360, 1520, 1550, 1600, 1615, 1700, 1900, 1984, 2000, 2108, 2125, 2356, 2375, 2480, 2500, 2584, 2635, 2720, 2945, 3040, 3100, 3230, 3400, 3800, 3875, 4000, 4216, 4250, 4712, 4750, 4960, 5000, 5168, 5270, 5440, 5890, 6080, 6200, 6460, 6800, 7600, 7750, 8000, 8075, 8432, 8500, 9424, 9500, 9920, 10000, 10013, 10336, 10540, 10625, 11780, 11875, 12400, 12920, 13175, 13600, 14725, 15200, 15500, 16150, 16864, 17000, 18848, 19000, 19375, 20000, 20026, 20672, 21080, 21250, 23560, 23750, 24800, 25840, 26350, 27200, 29450, 30400, 31000, 32300, 33728, 34000, 37696, 38000, 38750, 40000, 40052, 40375, 42160, 42500, 47120, 47500, 49600, 50065, 51680, 52700, 58900, 62000, 64600, 65875, 68000, 73625, 76000, 77500, 80104, 80750, 84320, 85000, 94240, 95000, 100130, 103360, 105400, 117800, 124000, 129200, 131750, 136000, 147250, 152000, 155000, 160208, 161500, 168640, 170000, 188480, 190000, 200260, 201875, 210800, 235600, 248000, 250325, 258400, 263500, 294500, 310000, 320416, 323000, 329375, 340000, 368125, 380000, 400520, 403750, 421600, 471200, 500650, 516800, 527000, 589000, 620000, 640832, 646000, 658750, 680000, 736250, 760000, 801040, 807500, 843200, 942400, 1001300, 1054000, 1178000, 1240000, 1251625, 1292000, 1317500, 1472500, 1602080, 1615000, 2002600, 2108000, 2356000, 2503250, 2584000, 2635000, 2945000, 3204160, 3230000, 4005200, 4216000, 4712000, 5006500, 5270000, 5890000, 6258125, 6460000, 8010400, 10013000, 10540000, 11780000, 12516250, 12920000, 16020800, 20026000, 21080000, 23560000, 25032500, 40052000, 50065000, 80104000, 100130000, 200260000, 400520000]

約数ペア:

[(1, 400520000), (2, 200260000), (4, 100130000), (5, 80104000), (8, 50065000), (10, 40052000), (16, 25032500), (17, 23560000), (19, 21080000), (20, 20026000), (25, 16020800), (31, 12920000), (32, 12516250), (34, 11780000), (38, 10540000), (40, 10013000), (50, 8010400), (62, 6460000), (64, 6258125), (68, 5890000), (76, 5270000), (80, 5006500), (85, 4712000), (95, 4216000), (100, 4005200), (124, 3230000), (125, 3204160), (136, 2945000), (152, 2635000), (155, 2584000), (160, 2503250), (170, 2356000), (190, 2108000), (200, 2002600), (248, 1615000), (250, 1602080), (272, 1472500), (304, 1317500), (310, 1292000), (320, 1251625), (323, 1240000), (340, 1178000), (380, 1054000), (400, 1001300), (425, 942400), (475, 843200), (496, 807500), (500, 801040), (527, 760000), (544, 736250), (589, 680000), (608, 658750), (620, 646000), (625, 640832), (646, 620000), (680, 589000), (760, 527000), (775, 516800), (800, 500650), (850, 471200), (950, 421600), (992, 403750), (1000, 400520), (1054, 380000), (1088, 368125), (1178, 340000), (1216, 329375), (1240, 323000), (1250, 320416), (1292, 310000), (1360, 294500), (1520, 263500), (1550, 258400), (1600, 250325), (1615, 248000), (1700, 235600), (1900, 210800), (1984, 201875), (2000, 200260), (2108, 190000), (2125, 188480), (2356, 170000), (2375, 168640), (2480, 161500), (2500, 160208), (2584, 155000), (2635, 152000), (2720, 147250), (2945, 136000), (3040, 131750), (3100, 129200), (3230, 124000), (3400, 117800), (3800, 105400), (3875, 103360), (4000, 100130), (4216, 95000), (4250, 94240), (4712, 85000), (4750, 84320), (4960, 80750), (5000, 80104), (5168, 77500), (5270, 76000), (5440, 73625), (5890, 68000), (6080, 65875), (6200, 64600), (6460, 62000), (6800, 58900), (7600, 52700), (7750, 51680), (8000, 50065), (8075, 49600), (8432, 47500), (8500, 47120), (9424, 42500), (9500, 42160), (9920, 40375), (10000, 40052), (10013, 40000), (10336, 38750), (10540, 38000), (10625, 37696), (11780, 34000), (11875, 33728), (12400, 32300), (12920, 31000), (13175, 30400), (13600, 29450), (14725, 27200), (15200, 26350), (15500, 25840), (16150, 24800), (16864, 23750), (17000, 23560), (18848, 21250), (19000, 21080), (19375, 20672), (20000, 20026)]