21162580

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55691}}^1$

素因数の和:55719

約数の個数: 24

約数和(自身を含む): 46781280

約数和(自身を除く): 25618700

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55691, 111382, 222764, 278455, 556910, 1058129, 1113820, 2116258, 4232516, 5290645, 10581290, 21162580]

約数ペア:

[(1, 21162580), (2, 10581290), (4, 5290645), (5, 4232516), (10, 2116258), (19, 1113820), (20, 1058129), (38, 556910), (76, 278455), (95, 222764), (190, 111382), (380, 55691)]