20981800

素因数分解:

$2^3\times 5^2\times 7^2\times {\mathrm{2141}}^1$

素因数の和:2171

約数の個数: 72

約数和(自身を含む): 56773710

約数和(自身を除く): 35791910

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 49, 50, 56, 70, 98, 100, 140, 175, 196, 200, 245, 280, 350, 392, 490, 700, 980, 1225, 1400, 1960, 2141, 2450, 4282, 4900, 8564, 9800, 10705, 14987, 17128, 21410, 29974, 42820, 53525, 59948, 74935, 85640, 104909, 107050, 119896, 149870, 209818, 214100, 299740, 374675, 419636, 428200, 524545, 599480, 749350, 839272, 1049090, 1498700, 2098180, 2622725, 2997400, 4196360, 5245450, 10490900, 20981800]

約数ペア:

[(1, 20981800), (2, 10490900), (4, 5245450), (5, 4196360), (7, 2997400), (8, 2622725), (10, 2098180), (14, 1498700), (20, 1049090), (25, 839272), (28, 749350), (35, 599480), (40, 524545), (49, 428200), (50, 419636), (56, 374675), (70, 299740), (98, 214100), (100, 209818), (140, 149870), (175, 119896), (196, 107050), (200, 104909), (245, 85640), (280, 74935), (350, 59948), (392, 53525), (490, 42820), (700, 29974), (980, 21410), (1225, 17128), (1400, 14987), (1960, 10705), (2141, 9800), (2450, 8564), (4282, 4900)]