20040265

素因数分解:

$5^1\times 7^2\times {\mathrm{157}}^1\times {\mathrm{521}}^1$

素因数の和:697

約数の個数: 24

約数和(自身を含む): 28206792

約数和(自身を除く): 8166527

約数列:

[1, 5, 7, 35, 49, 157, 245, 521, 785, 1099, 2605, 3647, 5495, 7693, 18235, 25529, 38465, 81797, 127645, 408985, 572579, 2862895, 4008053, 20040265]

約数ペア:

[(1, 20040265), (5, 4008053), (7, 2862895), (35, 572579), (49, 408985), (157, 127645), (245, 81797), (521, 38465), (785, 25529), (1099, 18235), (2605, 7693), (3647, 5495)]