21328000

素因数分解:

$2^7\times 5^3\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:103

約数の個数: 128

約数和(自身を含む): 56010240

約数和(自身を除く): 34682240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 43, 50, 62, 64, 80, 86, 100, 124, 125, 128, 155, 160, 172, 200, 215, 248, 250, 310, 320, 344, 400, 430, 496, 500, 620, 640, 688, 775, 800, 860, 992, 1000, 1075, 1240, 1333, 1376, 1550, 1600, 1720, 1984, 2000, 2150, 2480, 2666, 2752, 3100, 3200, 3440, 3875, 3968, 4000, 4300, 4960, 5332, 5375, 5504, 6200, 6665, 6880, 7750, 8000, 8600, 9920, 10664, 10750, 12400, 13330, 13760, 15500, 16000, 17200, 19840, 21328, 21500, 24800, 26660, 27520, 31000, 33325, 34400, 42656, 43000, 49600, 53320, 62000, 66650, 68800, 85312, 86000, 99200, 106640, 124000, 133300, 137600, 166625, 170624, 172000, 213280, 248000, 266600, 333250, 344000, 426560, 496000, 533200, 666500, 688000, 853120, 1066400, 1333000, 2132800, 2666000, 4265600, 5332000, 10664000, 21328000]

約数ペア:

[(1, 21328000), (2, 10664000), (4, 5332000), (5, 4265600), (8, 2666000), (10, 2132800), (16, 1333000), (20, 1066400), (25, 853120), (31, 688000), (32, 666500), (40, 533200), (43, 496000), (50, 426560), (62, 344000), (64, 333250), (80, 266600), (86, 248000), (100, 213280), (124, 172000), (125, 170624), (128, 166625), (155, 137600), (160, 133300), (172, 124000), (200, 106640), (215, 99200), (248, 86000), (250, 85312), (310, 68800), (320, 66650), (344, 62000), (400, 53320), (430, 49600), (496, 43000), (500, 42656), (620, 34400), (640, 33325), (688, 31000), (775, 27520), (800, 26660), (860, 24800), (992, 21500), (1000, 21328), (1075, 19840), (1240, 17200), (1333, 16000), (1376, 15500), (1550, 13760), (1600, 13330), (1720, 12400), (1984, 10750), (2000, 10664), (2150, 9920), (2480, 8600), (2666, 8000), (2752, 7750), (3100, 6880), (3200, 6665), (3440, 6200), (3875, 5504), (3968, 5375), (4000, 5332), (4300, 4960)]