215686520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{770309}}^1$

素因数の和:770327

約数の個数: 32

約数和(自身を含む): 554623200

約数和(自身を除く): 338936680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 770309, 1540618, 3081236, 3851545, 5392163, 6162472, 7703090, 10784326, 15406180, 21568652, 26960815, 30812360, 43137304, 53921630, 107843260, 215686520]

約数ペア:

[(1, 215686520), (2, 107843260), (4, 53921630), (5, 43137304), (7, 30812360), (8, 26960815), (10, 21568652), (14, 15406180), (20, 10784326), (28, 7703090), (35, 6162472), (40, 5392163), (56, 3851545), (70, 3081236), (140, 1540618), (280, 770309)]