253661140

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{64381}}^1$

素因数の和:64587

約数の個数: 24

約数和(自身を含む): 535400712

約数和(自身を除く): 281739572

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 64381, 128762, 257524, 321905, 643810, 1287620, 12683057, 25366114, 50732228, 63415285, 126830570, 253661140]

約数ペア:

[(1, 253661140), (2, 126830570), (4, 63415285), (5, 50732228), (10, 25366114), (20, 12683057), (197, 1287620), (394, 643810), (788, 321905), (985, 257524), (1970, 128762), (3940, 64381)]