12981520

素因数分解:

$2^4\times 5^1\times {\mathrm{162269}}^1$

素因数の和:162282

約数の個数: 20

約数和(自身を含む): 30182220

約数和(自身を除く): 17200700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 162269, 324538, 649076, 811345, 1298152, 1622690, 2596304, 3245380, 6490760, 12981520]

約数ペア:

[(1, 12981520), (2, 6490760), (4, 3245380), (5, 2596304), (8, 1622690), (10, 1298152), (16, 811345), (20, 649076), (40, 324538), (80, 162269)]