20398805

素因数分解:

$5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{5347}}^1$

素因数の和:5468

約数の個数: 16

約数和(自身を含む): 28237440

約数和(自身を除く): 7838635

約数列:

[1, 5, 7, 35, 109, 545, 763, 3815, 5347, 26735, 37429, 187145, 582823, 2914115, 4079761, 20398805]

約数ペア:

[(1, 20398805), (5, 4079761), (7, 2914115), (35, 582823), (109, 187145), (545, 37429), (763, 26735), (3815, 5347)]