640651325

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{569}}^1\times {\mathrm{1553}}^1$

素因数の和:2161

約数の個数: 24

約数和(自身を含む): 823775400

約数和(自身を除く): 183124075

約数列:

[1, 5, 25, 29, 145, 569, 725, 1553, 2845, 7765, 14225, 16501, 38825, 45037, 82505, 225185, 412525, 883657, 1125925, 4418285, 22091425, 25626053, 128130265, 640651325]

約数ペア:

[(1, 640651325), (5, 128130265), (25, 25626053), (29, 22091425), (145, 4418285), (569, 1125925), (725, 883657), (1553, 412525), (2845, 225185), (7765, 82505), (14225, 45037), (16501, 38825)]