21355550

素因数分解:

$2^1\times 5^2\times {\mathrm{89}}^1\times {\mathrm{4799}}^1$

素因数の和:4900

約数の個数: 24

約数和(自身を含む): 40176000

約数和(自身を除く): 18820450

約数列:

[1, 2, 5, 10, 25, 50, 89, 178, 445, 890, 2225, 4450, 4799, 9598, 23995, 47990, 119975, 239950, 427111, 854222, 2135555, 4271110, 10677775, 21355550]

約数ペア:

[(1, 21355550), (2, 10677775), (5, 4271110), (10, 2135555), (25, 854222), (50, 427111), (89, 239950), (178, 119975), (445, 47990), (890, 23995), (2225, 9598), (4450, 4799)]