21387641

素因数分解:

${\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{439}}^1$

素因数の和:596

約数の個数: 16

約数和(自身を含む): 24161280

約数和(自身を除く): 2773639

約数列:

[1, 11, 43, 103, 439, 473, 1133, 4429, 4829, 18877, 45217, 48719, 207647, 497387, 1944331, 21387641]

約数ペア:

[(1, 21387641), (11, 1944331), (43, 497387), (103, 207647), (439, 48719), (473, 45217), (1133, 18877), (4429, 4829)]