20531775

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{607}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 37997568

約数和(自身を除く): 17465793

約数列:

[1, 3, 5, 11, 15, 25, 33, 41, 55, 75, 123, 165, 205, 275, 451, 607, 615, 825, 1025, 1353, 1821, 2255, 3035, 3075, 6677, 6765, 9105, 11275, 15175, 20031, 24887, 33385, 33825, 45525, 74661, 100155, 124435, 166925, 273757, 373305, 500775, 622175, 821271, 1368785, 1866525, 4106355, 6843925, 20531775]

約数ペア:

[(1, 20531775), (3, 6843925), (5, 4106355), (11, 1866525), (15, 1368785), (25, 821271), (33, 622175), (41, 500775), (55, 373305), (75, 273757), (123, 166925), (165, 124435), (205, 100155), (275, 74661), (451, 45525), (607, 33825), (615, 33385), (825, 24887), (1025, 20031), (1353, 15175), (1821, 11275), (2255, 9105), (3035, 6765), (3075, 6677)]