21501025

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{727}}^1$

素因数の和:770

約数の個数: 36

約数和(自身を含む): 33039552

約数和(自身を除く): 11538527

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 169, 175, 325, 455, 727, 845, 1183, 2275, 3635, 4225, 5089, 5915, 9451, 18175, 25445, 29575, 47255, 66157, 122863, 127225, 236275, 330785, 614315, 860041, 1653925, 3071575, 4300205, 21501025]

約数ペア:

[(1, 21501025), (5, 4300205), (7, 3071575), (13, 1653925), (25, 860041), (35, 614315), (65, 330785), (91, 236275), (169, 127225), (175, 122863), (325, 66157), (455, 47255), (727, 29575), (845, 25445), (1183, 18175), (2275, 9451), (3635, 5915), (4225, 5089)]