21018950

素因数分解:

$2^1\times 5^2\times {\mathrm{131}}^1\times {\mathrm{3209}}^1$

素因数の和:3352

約数の個数: 24

約数和(自身を含む): 39405960

約数和(自身を除く): 18387010

約数列:

[1, 2, 5, 10, 25, 50, 131, 262, 655, 1310, 3209, 3275, 6418, 6550, 16045, 32090, 80225, 160450, 420379, 840758, 2101895, 4203790, 10509475, 21018950]

約数ペア:

[(1, 21018950), (2, 10509475), (5, 4203790), (10, 2101895), (25, 840758), (50, 420379), (131, 160450), (262, 80225), (655, 32090), (1310, 16045), (3209, 6550), (3275, 6418)]