20855905

素因数分解:

$5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{5569}}^1$

素因数の和:5688

約数の個数: 16

約数和(自身を含む): 28874880

約数和(自身を除く): 8018975

約数列:

[1, 5, 7, 35, 107, 535, 749, 3745, 5569, 27845, 38983, 194915, 595883, 2979415, 4171181, 20855905]

約数ペア:

[(1, 20855905), (5, 4171181), (7, 2979415), (35, 595883), (107, 194915), (535, 38983), (749, 27845), (3745, 5569)]