81398325

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{257}}^1$

素因数の和:414

約数の個数: 48

約数和(自身を含む): 139741056

約数和(自身を除く): 58342731

約数列:

[1, 3, 5, 15, 25, 41, 75, 103, 123, 205, 257, 309, 515, 615, 771, 1025, 1285, 1545, 2575, 3075, 3855, 4223, 6425, 7725, 10537, 12669, 19275, 21115, 26471, 31611, 52685, 63345, 79413, 105575, 132355, 158055, 263425, 316725, 397065, 661775, 790275, 1085311, 1985325, 3255933, 5426555, 16279665, 27132775, 81398325]

約数ペア:

[(1, 81398325), (3, 27132775), (5, 16279665), (15, 5426555), (25, 3255933), (41, 1985325), (75, 1085311), (103, 790275), (123, 661775), (205, 397065), (257, 316725), (309, 263425), (515, 158055), (615, 132355), (771, 105575), (1025, 79413), (1285, 63345), (1545, 52685), (2575, 31611), (3075, 26471), (3855, 21115), (4223, 19275), (6425, 12669), (7725, 10537)]