21163964

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{74521}}^1$

素因数の和:74596

約数の個数: 12

約数和(自身を含む): 37559088

約数和(自身を除く): 16395124

約数列:

[1, 2, 4, 71, 142, 284, 74521, 149042, 298084, 5290991, 10581982, 21163964]

約数ペア:

[(1, 21163964), (2, 10581982), (4, 5290991), (71, 298084), (142, 149042), (284, 74521)]