21444980

素因数分解:

$2^2\times 5^1\times {\mathrm{761}}^1\times {\mathrm{1409}}^1$

素因数の和:2179

約数の個数: 24

約数和(自身を含む): 45125640

約数和(自身を除く): 23680660

約数列:

[1, 2, 4, 5, 10, 20, 761, 1409, 1522, 2818, 3044, 3805, 5636, 7045, 7610, 14090, 15220, 28180, 1072249, 2144498, 4288996, 5361245, 10722490, 21444980]

約数ペア:

[(1, 21444980), (2, 10722490), (4, 5361245), (5, 4288996), (10, 2144498), (20, 1072249), (761, 28180), (1409, 15220), (1522, 14090), (2818, 7610), (3044, 7045), (3805, 5636)]