20721806

素因数分解:

$2^1\times 7^2\times {\mathrm{353}}^1\times {\mathrm{599}}^1$

素因数の和:968

約数の個数: 24

約数和(自身を含む): 36320400

約数和(自身を除く): 15598594

約数列:

[1, 2, 7, 14, 49, 98, 353, 599, 706, 1198, 2471, 4193, 4942, 8386, 17297, 29351, 34594, 58702, 211447, 422894, 1480129, 2960258, 10360903, 20721806]

約数ペア:

[(1, 20721806), (2, 10360903), (7, 2960258), (14, 1480129), (49, 422894), (98, 211447), (353, 58702), (599, 34594), (706, 29351), (1198, 17297), (2471, 8386), (4193, 4942)]