21521205

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{25171}}^1$

素因数の和:25201

約数の個数: 24

約数和(自身を含む): 39268320

約数和(自身を除く): 17747115

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855, 25171, 75513, 125855, 226539, 377565, 478249, 1132695, 1434747, 2391245, 4304241, 7173735, 21521205]

約数ペア:

[(1, 21521205), (3, 7173735), (5, 4304241), (9, 2391245), (15, 1434747), (19, 1132695), (45, 478249), (57, 377565), (95, 226539), (171, 125855), (285, 75513), (855, 25171)]