7880420

素因数分解:

$2^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1129}}^1$

素因数の和:1487

約数の個数: 24

約数和(自身を含む): 16611000

約数和(自身を除く): 8730580

約数列:

[1, 2, 4, 5, 10, 20, 349, 698, 1129, 1396, 1745, 2258, 3490, 4516, 5645, 6980, 11290, 22580, 394021, 788042, 1576084, 1970105, 3940210, 7880420]

約数ペア:

[(1, 7880420), (2, 3940210), (4, 1970105), (5, 1576084), (10, 788042), (20, 394021), (349, 22580), (698, 11290), (1129, 6980), (1396, 5645), (1745, 4516), (2258, 3490)]