21626660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{499}}^1$

素因数の和:716

約数の個数: 48

約数和(自身を含む): 49896000

約数和(自身を除く): 28269340

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 197, 220, 394, 499, 788, 985, 998, 1970, 1996, 2167, 2495, 3940, 4334, 4990, 5489, 8668, 9980, 10835, 10978, 21670, 21956, 27445, 43340, 54890, 98303, 109780, 196606, 393212, 491515, 983030, 1081333, 1966060, 2162666, 4325332, 5406665, 10813330, 21626660]

約数ペア:

[(1, 21626660), (2, 10813330), (4, 5406665), (5, 4325332), (10, 2162666), (11, 1966060), (20, 1081333), (22, 983030), (44, 491515), (55, 393212), (110, 196606), (197, 109780), (220, 98303), (394, 54890), (499, 43340), (788, 27445), (985, 21956), (998, 21670), (1970, 10978), (1996, 10835), (2167, 9980), (2495, 8668), (3940, 5489), (4334, 4990)]