20005080700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{256147}}^1$

素因数の和:256243

約数の個数: 72

約数和(自身を含む): 48024676224

約数和(自身を除く): 28019595524

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 71, 100, 110, 142, 220, 275, 284, 355, 550, 710, 781, 1100, 1420, 1562, 1775, 3124, 3550, 3905, 7100, 7810, 15620, 19525, 39050, 78100, 256147, 512294, 1024588, 1280735, 2561470, 2817617, 5122940, 5635234, 6403675, 11270468, 12807350, 14088085, 18186437, 25614700, 28176170, 36372874, 56352340, 70440425, 72745748, 90932185, 140880850, 181864370, 200050807, 281761700, 363728740, 400101614, 454660925, 800203228, 909321850, 1000254035, 1818643700, 2000508070, 4001016140, 5001270175, 10002540350, 20005080700]

約数ペア:

[(1, 20005080700), (2, 10002540350), (4, 5001270175), (5, 4001016140), (10, 2000508070), (11, 1818643700), (20, 1000254035), (22, 909321850), (25, 800203228), (44, 454660925), (50, 400101614), (55, 363728740), (71, 281761700), (100, 200050807), (110, 181864370), (142, 140880850), (220, 90932185), (275, 72745748), (284, 70440425), (355, 56352340), (550, 36372874), (710, 28176170), (781, 25614700), (1100, 18186437), (1420, 14088085), (1562, 12807350), (1775, 11270468), (3124, 6403675), (3550, 5635234), (3905, 5122940), (7100, 2817617), (7810, 2561470), (15620, 1280735), (19525, 1024588), (39050, 512294), (78100, 256147)]