21051715

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:259

約数の個数: 24

約数和(自身を含む): 27157680

約数和(自身を除く): 6105965

約数列:

[1, 5, 19, 95, 107, 109, 361, 535, 545, 1805, 2033, 2071, 10165, 10355, 11663, 38627, 39349, 58315, 193135, 196745, 221597, 1107985, 4210343, 21051715]

約数ペア:

[(1, 21051715), (5, 4210343), (19, 1107985), (95, 221597), (107, 196745), (109, 193135), (361, 58315), (535, 39349), (545, 38627), (1805, 11663), (2033, 10355), (2071, 10165)]