81978885

素因数分解:

$3^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{4937}}^1$

素因数の和:4995

約数の個数: 40

約数和(自身を含む): 150569496

約数和(自身を除く): 68590611

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 81, 123, 135, 205, 369, 405, 615, 1107, 1845, 3321, 4937, 5535, 14811, 16605, 24685, 44433, 74055, 133299, 202417, 222165, 399897, 607251, 666495, 1012085, 1821753, 1999485, 3036255, 5465259, 9108765, 16395777, 27326295, 81978885]

約数ペア:

[(1, 81978885), (3, 27326295), (5, 16395777), (9, 9108765), (15, 5465259), (27, 3036255), (41, 1999485), (45, 1821753), (81, 1012085), (123, 666495), (135, 607251), (205, 399897), (369, 222165), (405, 202417), (615, 133299), (1107, 74055), (1845, 44433), (3321, 24685), (4937, 16605), (5535, 14811)]