28382780

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{3539}}^1$

素因数の和:3949

約数の個数: 24

約数和(自身を含む): 59769360

約数和(自身を除く): 31386580

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 3539, 4010, 7078, 8020, 14156, 17695, 35390, 70780, 1419139, 2838278, 5676556, 7095695, 14191390, 28382780]

約数ペア:

[(1, 28382780), (2, 14191390), (4, 7095695), (5, 5676556), (10, 2838278), (20, 1419139), (401, 70780), (802, 35390), (1604, 17695), (2005, 14156), (3539, 8020), (4010, 7078)]