20457525

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{181}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 37372608

約数和(自身を除く): 16915083

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 137, 165, 181, 275, 411, 543, 685, 825, 905, 1507, 1991, 2055, 2715, 3425, 4521, 4525, 5973, 7535, 9955, 10275, 13575, 22605, 24797, 29865, 37675, 49775, 74391, 113025, 123985, 149325, 272767, 371955, 619925, 818301, 1363835, 1859775, 4091505, 6819175, 20457525]

約数ペア:

[(1, 20457525), (3, 6819175), (5, 4091505), (11, 1859775), (15, 1363835), (25, 818301), (33, 619925), (55, 371955), (75, 272767), (137, 149325), (165, 123985), (181, 113025), (275, 74391), (411, 49775), (543, 37675), (685, 29865), (825, 24797), (905, 22605), (1507, 13575), (1991, 10275), (2055, 9955), (2715, 7535), (3425, 5973), (4521, 4525)]