21121810

素因数分解:

$2^1\times 5^1\times {\mathrm{1063}}^1\times {\mathrm{1987}}^1$

素因数の和:3057

約数の個数: 16

約数和(自身を含む): 38074176

約数和(自身を除く): 16952366

約数列:

[1, 2, 5, 10, 1063, 1987, 2126, 3974, 5315, 9935, 10630, 19870, 2112181, 4224362, 10560905, 21121810]

約数ペア:

[(1, 21121810), (2, 10560905), (5, 4224362), (10, 2112181), (1063, 19870), (1987, 10630), (2126, 9935), (3974, 5315)]