21299090

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{51949}}^1$

素因数の和:51997

約数の個数: 16

約数和(自身を含む): 39274200

約数和(自身を除く): 17975110

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 51949, 103898, 259745, 519490, 2129909, 4259818, 10649545, 21299090]

約数ペア:

[(1, 21299090), (2, 10649545), (5, 4259818), (10, 2129909), (41, 519490), (82, 259745), (205, 103898), (410, 51949)]