21707225

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{379}}^1$

素因数の和:497

約数の個数: 24

約数和(自身を含む): 28272000

約数和(自身を除く): 6564775

約数列:

[1, 5, 25, 29, 79, 145, 379, 395, 725, 1895, 1975, 2291, 9475, 10991, 11455, 29941, 54955, 57275, 149705, 274775, 748525, 868289, 4341445, 21707225]

約数ペア:

[(1, 21707225), (5, 4341445), (25, 868289), (29, 748525), (79, 274775), (145, 149705), (379, 57275), (395, 54955), (725, 29941), (1895, 11455), (1975, 10991), (2291, 9475)]