21436640

素因数分解:

$2^5\times 5^1\times {\mathrm{133979}}^1$

素因数の和:133994

約数の個数: 24

約数和(自身を含む): 50644440

約数和(自身を除く): 29207800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 133979, 267958, 535916, 669895, 1071832, 1339790, 2143664, 2679580, 4287328, 5359160, 10718320, 21436640]

約数ペア:

[(1, 21436640), (2, 10718320), (4, 5359160), (5, 4287328), (8, 2679580), (10, 2143664), (16, 1339790), (20, 1071832), (32, 669895), (40, 535916), (80, 267958), (160, 133979)]