21797275

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{421}}^1$

素因数の和:559

約数の個数: 24

約数和(自身を含む): 28780400

約数和(自身を除く): 6983125

約数列:

[1, 5, 19, 25, 95, 109, 421, 475, 545, 2071, 2105, 2725, 7999, 10355, 10525, 39995, 45889, 51775, 199975, 229445, 871891, 1147225, 4359455, 21797275]

約数ペア:

[(1, 21797275), (5, 4359455), (19, 1147225), (25, 871891), (95, 229445), (109, 199975), (421, 51775), (475, 45889), (545, 39995), (2071, 10525), (2105, 10355), (2725, 7999)]