20691675

素因数分解:

$3^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{2243}}^1$

素因数の和:2300

約数の個数: 36

約数和(自身を含む): 37981944

約数和(自身を除く): 17290269

約数列:

[1, 3, 5, 9, 15, 25, 41, 45, 75, 123, 205, 225, 369, 615, 1025, 1845, 2243, 3075, 6729, 9225, 11215, 20187, 33645, 56075, 91963, 100935, 168225, 275889, 459815, 504675, 827667, 1379445, 2299075, 4138335, 6897225, 20691675]

約数ペア:

[(1, 20691675), (3, 6897225), (5, 4138335), (9, 2299075), (15, 1379445), (25, 827667), (41, 504675), (45, 459815), (75, 275889), (123, 168225), (205, 100935), (225, 91963), (369, 56075), (615, 33645), (1025, 20187), (1845, 11215), (2243, 9225), (3075, 6729)]