20517128

素因数分解:

$2^3\times {\mathrm{641}}^1\times {\mathrm{4001}}^1$

素因数の和:4648

約数の個数: 16

約数和(自身を含む): 38539260

約数和(自身を除く): 18022132

約数列:

[1, 2, 4, 8, 641, 1282, 2564, 4001, 5128, 8002, 16004, 32008, 2564641, 5129282, 10258564, 20517128]

約数ペア:

[(1, 20517128), (2, 10258564), (4, 5129282), (8, 2564641), (641, 32008), (1282, 16004), (2564, 8002), (4001, 5128)]