20945705

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{389}}^1$

素因数の和:505

約数の個数: 24

約数和(自身を含む): 28009800

約数和(自身を除く): 7064095

約数列:

[1, 5, 11, 55, 89, 121, 389, 445, 605, 979, 1945, 4279, 4895, 10769, 21395, 34621, 47069, 53845, 173105, 235345, 380831, 1904155, 4189141, 20945705]

約数ペア:

[(1, 20945705), (5, 4189141), (11, 1904155), (55, 380831), (89, 235345), (121, 173105), (389, 53845), (445, 47069), (605, 34621), (979, 21395), (1945, 10769), (4279, 4895)]