257841825

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{1181}}^1$

素因数の和:1306

約数の個数: 48

約数和(自身を含む): 443221632

約数和(自身を除く): 185379807

約数列:

[1, 3, 5, 15, 25, 41, 71, 75, 123, 205, 213, 355, 615, 1025, 1065, 1181, 1775, 2911, 3075, 3543, 5325, 5905, 8733, 14555, 17715, 29525, 43665, 48421, 72775, 83851, 88575, 145263, 218325, 242105, 251553, 419255, 726315, 1210525, 1257765, 2096275, 3437891, 3631575, 6288825, 10313673, 17189455, 51568365, 85947275, 257841825]

約数ペア:

[(1, 257841825), (3, 85947275), (5, 51568365), (15, 17189455), (25, 10313673), (41, 6288825), (71, 3631575), (75, 3437891), (123, 2096275), (205, 1257765), (213, 1210525), (355, 726315), (615, 419255), (1025, 251553), (1065, 242105), (1181, 218325), (1775, 145263), (2911, 88575), (3075, 83851), (3543, 72775), (5325, 48421), (5905, 43665), (8733, 29525), (14555, 17715)]