21587775

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{191}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 39426048

約数和(自身を除く): 17838273

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 137, 165, 191, 275, 411, 573, 685, 825, 955, 1507, 2055, 2101, 2865, 3425, 4521, 4775, 6303, 7535, 10275, 10505, 14325, 22605, 26167, 31515, 37675, 52525, 78501, 113025, 130835, 157575, 287837, 392505, 654175, 863511, 1439185, 1962525, 4317555, 7195925, 21587775]

約数ペア:

[(1, 21587775), (3, 7195925), (5, 4317555), (11, 1962525), (15, 1439185), (25, 863511), (33, 654175), (55, 392505), (75, 287837), (137, 157575), (165, 130835), (191, 113025), (275, 78501), (411, 52525), (573, 37675), (685, 31515), (825, 26167), (955, 22605), (1507, 14325), (2055, 10505), (2101, 10275), (2865, 7535), (3425, 6303), (4521, 4775)]