20664550

素因数分解:

$2^1\times 5^2\times {\mathrm{71}}^1\times {\mathrm{5821}}^1$

素因数の和:5904

約数の個数: 24

約数和(自身を含む): 38984112

約数和(自身を除く): 18319562

約数列:

[1, 2, 5, 10, 25, 50, 71, 142, 355, 710, 1775, 3550, 5821, 11642, 29105, 58210, 145525, 291050, 413291, 826582, 2066455, 4132910, 10332275, 20664550]

約数ペア:

[(1, 20664550), (2, 10332275), (5, 4132910), (10, 2066455), (25, 826582), (50, 413291), (71, 291050), (142, 145525), (355, 58210), (710, 29105), (1775, 11642), (3550, 5821)]