18745025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{421}}^1$

素因数の和:581

約数の個数: 24

約数和(自身を含む): 25274424

約数和(自身を除く): 6529399

約数列:

[1, 5, 13, 25, 65, 137, 325, 421, 685, 1781, 2105, 3425, 5473, 8905, 10525, 27365, 44525, 57677, 136825, 288385, 749801, 1441925, 3749005, 18745025]

約数ペア:

[(1, 18745025), (5, 3749005), (13, 1441925), (25, 749801), (65, 288385), (137, 136825), (325, 57677), (421, 44525), (685, 27365), (1781, 10525), (2105, 8905), (3425, 5473)]