1290217825

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{305377}}^1$

素因数の和:305413

約数の個数: 18

約数和(自身を含む): 1732409394

約数和(自身を除く): 442191569

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 305377, 1526885, 3969901, 7634425, 19849505, 51608713, 99247525, 258043565, 1290217825]

約数ペア:

[(1, 1290217825), (5, 258043565), (13, 99247525), (25, 51608713), (65, 19849505), (169, 7634425), (325, 3969901), (845, 1526885), (4225, 305377)]