21080000

素因数分解:

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

素因数の和:80

約数の個数: 140

約数和(自身を含む): 57131712

約数和(自身を除く): 36051712

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 31, 32, 34, 40, 50, 62, 64, 68, 80, 85, 100, 124, 125, 136, 155, 160, 170, 200, 248, 250, 272, 310, 320, 340, 400, 425, 496, 500, 527, 544, 620, 625, 680, 775, 800, 850, 992, 1000, 1054, 1088, 1240, 1250, 1360, 1550, 1600, 1700, 1984, 2000, 2108, 2125, 2480, 2500, 2635, 2720, 3100, 3400, 3875, 4000, 4216, 4250, 4960, 5000, 5270, 5440, 6200, 6800, 7750, 8000, 8432, 8500, 9920, 10000, 10540, 10625, 12400, 13175, 13600, 15500, 16864, 17000, 19375, 20000, 21080, 21250, 24800, 26350, 27200, 31000, 33728, 34000, 38750, 40000, 42160, 42500, 49600, 52700, 62000, 65875, 68000, 77500, 84320, 85000, 105400, 124000, 131750, 136000, 155000, 168640, 170000, 210800, 248000, 263500, 310000, 329375, 340000, 421600, 527000, 620000, 658750, 680000, 843200, 1054000, 1240000, 1317500, 2108000, 2635000, 4216000, 5270000, 10540000, 21080000]

約数ペア:

[(1, 21080000), (2, 10540000), (4, 5270000), (5, 4216000), (8, 2635000), (10, 2108000), (16, 1317500), (17, 1240000), (20, 1054000), (25, 843200), (31, 680000), (32, 658750), (34, 620000), (40, 527000), (50, 421600), (62, 340000), (64, 329375), (68, 310000), (80, 263500), (85, 248000), (100, 210800), (124, 170000), (125, 168640), (136, 155000), (155, 136000), (160, 131750), (170, 124000), (200, 105400), (248, 85000), (250, 84320), (272, 77500), (310, 68000), (320, 65875), (340, 62000), (400, 52700), (425, 49600), (496, 42500), (500, 42160), (527, 40000), (544, 38750), (620, 34000), (625, 33728), (680, 31000), (775, 27200), (800, 26350), (850, 24800), (992, 21250), (1000, 21080), (1054, 20000), (1088, 19375), (1240, 17000), (1250, 16864), (1360, 15500), (1550, 13600), (1600, 13175), (1700, 12400), (1984, 10625), (2000, 10540), (2108, 10000), (2125, 9920), (2480, 8500), (2500, 8432), (2635, 8000), (2720, 7750), (3100, 6800), (3400, 6200), (3875, 5440), (4000, 5270), (4216, 5000), (4250, 4960)]