9980840

素因数分解:

$2^3\times 5^1\times {\mathrm{249521}}^1$

素因数の和:249532

約数の個数: 16

約数和(自身を含む): 22456980

約数和(自身を除く): 12476140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 249521, 499042, 998084, 1247605, 1996168, 2495210, 4990420, 9980840]

約数ペア:

[(1, 9980840), (2, 4990420), (4, 2495210), (5, 1996168), (8, 1247605), (10, 998084), (20, 499042), (40, 249521)]