21204967

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{2441}}^1$

素因数の和:2538

約数の個数: 16

約数和(自身を含む): 26021952

約数和(自身を除く): 4816985

約数列:

[1, 7, 17, 73, 119, 511, 1241, 2441, 8687, 17087, 41497, 178193, 290479, 1247351, 3029281, 21204967]

約数ペア:

[(1, 21204967), (7, 3029281), (17, 1247351), (73, 290479), (119, 178193), (511, 41497), (1241, 17087), (2441, 8687)]