20119725

素因数分解:

$3^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{727}}^1$

素因数の和:787

約数の個数: 48

約数和(自身を含む): 37914240

約数和(自身を除く): 17794515

約数列:

[1, 3, 5, 9, 15, 25, 27, 41, 45, 75, 123, 135, 205, 225, 369, 615, 675, 727, 1025, 1107, 1845, 2181, 3075, 3635, 5535, 6543, 9225, 10905, 18175, 19629, 27675, 29807, 32715, 54525, 89421, 98145, 149035, 163575, 268263, 447105, 490725, 745175, 804789, 1341315, 2235525, 4023945, 6706575, 20119725]

約数ペア:

[(1, 20119725), (3, 6706575), (5, 4023945), (9, 2235525), (15, 1341315), (25, 804789), (27, 745175), (41, 490725), (45, 447105), (75, 268263), (123, 163575), (135, 149035), (205, 98145), (225, 89421), (369, 54525), (615, 32715), (675, 29807), (727, 27675), (1025, 19629), (1107, 18175), (1845, 10905), (2181, 9225), (3075, 6543), (3635, 5535)]