19782475

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{523}}^1$

素因数の和:639

約数の個数: 24

約数和(自身を含む): 26315280

約数和(自身を除く): 6532805

約数列:

[1, 5, 17, 25, 85, 89, 425, 445, 523, 1513, 2225, 2615, 7565, 8891, 13075, 37825, 44455, 46547, 222275, 232735, 791299, 1163675, 3956495, 19782475]

約数ペア:

[(1, 19782475), (5, 3956495), (17, 1163675), (25, 791299), (85, 232735), (89, 222275), (425, 46547), (445, 44455), (523, 37825), (1513, 13075), (2225, 8891), (2615, 7565)]