18686775

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{103}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 32497920

約数和(自身を除く): 13811145

約数列:

[1, 3, 5, 15, 25, 41, 59, 75, 103, 123, 177, 205, 295, 309, 515, 615, 885, 1025, 1475, 1545, 2419, 2575, 3075, 4223, 4425, 6077, 7257, 7725, 12095, 12669, 18231, 21115, 30385, 36285, 60475, 63345, 91155, 105575, 151925, 181425, 249157, 316725, 455775, 747471, 1245785, 3737355, 6228925, 18686775]

約数ペア:

[(1, 18686775), (3, 6228925), (5, 3737355), (15, 1245785), (25, 747471), (41, 455775), (59, 316725), (75, 249157), (103, 181425), (123, 151925), (177, 105575), (205, 91155), (295, 63345), (309, 60475), (515, 36285), (615, 30385), (885, 21115), (1025, 18231), (1475, 12669), (1545, 12095), (2419, 7725), (2575, 7257), (3075, 6077), (4223, 4425)]