20578995

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 39398400

約数和(自身を除く): 18819405

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 71, 95, 113, 135, 171, 213, 285, 339, 355, 513, 565, 639, 855, 1017, 1065, 1349, 1695, 1917, 2147, 2565, 3051, 3195, 4047, 5085, 6441, 6745, 8023, 9585, 10735, 12141, 15255, 19323, 20235, 24069, 32205, 36423, 40115, 57969, 60705, 72207, 96615, 120345, 152437, 182115, 216621, 289845, 361035, 457311, 762185, 1083105, 1371933, 2286555, 4115799, 6859665, 20578995]

約数ペア:

[(1, 20578995), (3, 6859665), (5, 4115799), (9, 2286555), (15, 1371933), (19, 1083105), (27, 762185), (45, 457311), (57, 361035), (71, 289845), (95, 216621), (113, 182115), (135, 152437), (171, 120345), (213, 96615), (285, 72207), (339, 60705), (355, 57969), (513, 40115), (565, 36423), (639, 32205), (855, 24069), (1017, 20235), (1065, 19323), (1349, 15255), (1695, 12141), (1917, 10735), (2147, 9585), (2565, 8023), (3051, 6745), (3195, 6441), (4047, 5085)]