21758396

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{499}}^1\times {\mathrm{991}}^1$

素因数の和:1505

約数の個数: 24

約数和(自身を含む): 41664000

約数和(自身を除く): 19905604

約数列:

[1, 2, 4, 11, 22, 44, 499, 991, 998, 1982, 1996, 3964, 5489, 10901, 10978, 21802, 21956, 43604, 494509, 989018, 1978036, 5439599, 10879198, 21758396]

約数ペア:

[(1, 21758396), (2, 10879198), (4, 5439599), (11, 1978036), (22, 989018), (44, 494509), (499, 43604), (991, 21956), (998, 21802), (1982, 10978), (1996, 10901), (3964, 5489)]