21628180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{154487}}^1$

素因数の和:154503

約数の個数: 24

約数和(自身を含む): 51907968

約数和(自身を除く): 30279788

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 154487, 308974, 617948, 772435, 1081409, 1544870, 2162818, 3089740, 4325636, 5407045, 10814090, 21628180]

約数ペア:

[(1, 21628180), (2, 10814090), (4, 5407045), (5, 4325636), (7, 3089740), (10, 2162818), (14, 1544870), (20, 1081409), (28, 772435), (35, 617948), (70, 308974), (140, 154487)]