21897220

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13859}}^1$

素因数の和:13947

約数の個数: 24

約数和(自身を含む): 46569600

約数和(自身を除く): 24672380

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13859, 27718, 55436, 69295, 138590, 277180, 1094861, 2189722, 4379444, 5474305, 10948610, 21897220]

約数ペア:

[(1, 21897220), (2, 10948610), (4, 5474305), (5, 4379444), (10, 2189722), (20, 1094861), (79, 277180), (158, 138590), (316, 69295), (395, 55436), (790, 27718), (1580, 13859)]