20320975

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{239}}^1$

素因数の和:447

約数の個数: 24

約数和(自身を含む): 26784000

約数和(自身を除く): 6463025

約数列:

[1, 5, 19, 25, 95, 179, 239, 475, 895, 1195, 3401, 4475, 4541, 5975, 17005, 22705, 42781, 85025, 113525, 213905, 812839, 1069525, 4064195, 20320975]

約数ペア:

[(1, 20320975), (5, 4064195), (19, 1069525), (25, 812839), (95, 213905), (179, 113525), (239, 85025), (475, 42781), (895, 22705), (1195, 17005), (3401, 5975), (4475, 4541)]