1221025

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{17}}^2$

素因数の和:70

約数の個数: 27

約数和(自身を含む): 1741611

約数和(自身を除く): 520586

約数列:

[1, 5, 13, 17, 25, 65, 85, 169, 221, 289, 325, 425, 845, 1105, 1445, 2873, 3757, 4225, 5525, 7225, 14365, 18785, 48841, 71825, 93925, 244205, 1221025]

約数ペア:

[(1, 1221025), (5, 244205), (13, 93925), (17, 71825), (25, 48841), (65, 18785), (85, 14365), (169, 7225), (221, 5525), (289, 4225), (325, 3757), (425, 2873), (845, 1445)]