19996640

素因数分解:

$2^5\times 5^1\times {\mathrm{124979}}^1$

素因数の和:124994

約数の個数: 24

約数和(自身を含む): 47242440

約数和(自身を除く): 27245800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 124979, 249958, 499916, 624895, 999832, 1249790, 1999664, 2499580, 3999328, 4999160, 9998320, 19996640]

約数ペア:

[(1, 19996640), (2, 9998320), (4, 4999160), (5, 3999328), (8, 2499580), (10, 1999664), (16, 1249790), (20, 999832), (32, 624895), (40, 499916), (80, 249958), (160, 124979)]