20105225

素因数分解:

$5^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{877}}^1$

素因数の和:1025

約数の個数: 24

約数和(自身を含む): 28742208

約数和(自身を除く): 8636983

約数列:

[1, 5, 7, 25, 35, 131, 175, 655, 877, 917, 3275, 4385, 4585, 6139, 21925, 22925, 30695, 114887, 153475, 574435, 804209, 2872175, 4021045, 20105225]

約数ペア:

[(1, 20105225), (5, 4021045), (7, 2872175), (25, 804209), (35, 574435), (131, 153475), (175, 114887), (655, 30695), (877, 22925), (917, 21925), (3275, 6139), (4385, 4585)]