21268505

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{1709}}^1$

素因数の和:1864

約数の個数: 16

約数和(自身を含む): 27086400

約数和(自身を除く): 5817895

約数列:

[1, 5, 19, 95, 131, 655, 1709, 2489, 8545, 12445, 32471, 162355, 223879, 1119395, 4253701, 21268505]

約数ペア:

[(1, 21268505), (5, 4253701), (19, 1119395), (95, 223879), (131, 162355), (655, 32471), (1709, 12445), (2489, 8545)]