128978225

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{2437}}^1$

素因数の和:2549

約数の個数: 24

約数和(自身を含む): 167783160

約数和(自身を除く): 38804935

約数列:

[1, 5, 25, 29, 73, 145, 365, 725, 1825, 2117, 2437, 10585, 12185, 52925, 60925, 70673, 177901, 353365, 889505, 1766825, 4447525, 5159129, 25795645, 128978225]

約数ペア:

[(1, 128978225), (5, 25795645), (25, 5159129), (29, 4447525), (73, 1766825), (145, 889505), (365, 353365), (725, 177901), (1825, 70673), (2117, 60925), (2437, 52925), (10585, 12185)]