21105925

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{937}}^1$

素因数の和:1017

約数の個数: 24

約数和(自身を含む): 28263816

約数和(自身を除く): 7157891

約数列:

[1, 5, 17, 25, 53, 85, 265, 425, 901, 937, 1325, 4505, 4685, 15929, 22525, 23425, 49661, 79645, 248305, 398225, 844237, 1241525, 4221185, 21105925]

約数ペア:

[(1, 21105925), (5, 4221185), (17, 1241525), (25, 844237), (53, 398225), (85, 248305), (265, 79645), (425, 49661), (901, 23425), (937, 22525), (1325, 15929), (4505, 4685)]