20897260

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7517}}^1$

素因数の和:7665

約数の個数: 24

約数和(自身を含む): 44205840

約数和(自身を除く): 23308580

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7517, 15034, 30068, 37585, 75170, 150340, 1044863, 2089726, 4179452, 5224315, 10448630, 20897260]

約数ペア:

[(1, 20897260), (2, 10448630), (4, 5224315), (5, 4179452), (10, 2089726), (20, 1044863), (139, 150340), (278, 75170), (556, 37585), (695, 30068), (1390, 15034), (2780, 7517)]