21331160

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2707}}^1$

素因数の和:2915

約数の個数: 32

約数和(自身を含む): 48256560

約数和(自身を除く): 26925400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2707, 3940, 5414, 7880, 10828, 13535, 21656, 27070, 54140, 108280, 533279, 1066558, 2133116, 2666395, 4266232, 5332790, 10665580, 21331160]

約数ペア:

[(1, 21331160), (2, 10665580), (4, 5332790), (5, 4266232), (8, 2666395), (10, 2133116), (20, 1066558), (40, 533279), (197, 108280), (394, 54140), (788, 27070), (985, 21656), (1576, 13535), (1970, 10828), (2707, 7880), (3940, 5414)]