31231225

素因数分解:

$5^2\times {\mathrm{73}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:349

約数の個数: 24

約数和(自身を含む): 39869720

約数和(自身を除く): 8638495

約数列:

[1, 5, 25, 73, 109, 157, 365, 545, 785, 1825, 2725, 3925, 7957, 11461, 17113, 39785, 57305, 85565, 198925, 286525, 427825, 1249249, 6246245, 31231225]

約数ペア:

[(1, 31231225), (5, 6246245), (25, 1249249), (73, 427825), (109, 286525), (157, 198925), (365, 85565), (545, 57305), (785, 39785), (1825, 17113), (2725, 11461), (3925, 7957)]