20781700

素因数分解:

$2^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{2927}}^1$

素因数の和:3012

約数の個数: 36

約数和(自身を含む): 45747072

約数和(自身を除く): 24965372

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 100, 142, 284, 355, 710, 1420, 1775, 2927, 3550, 5854, 7100, 11708, 14635, 29270, 58540, 73175, 146350, 207817, 292700, 415634, 831268, 1039085, 2078170, 4156340, 5195425, 10390850, 20781700]

約数ペア:

[(1, 20781700), (2, 10390850), (4, 5195425), (5, 4156340), (10, 2078170), (20, 1039085), (25, 831268), (50, 415634), (71, 292700), (100, 207817), (142, 146350), (284, 73175), (355, 58540), (710, 29270), (1420, 14635), (1775, 11708), (2927, 7100), (3550, 5854)]