21123487

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{6691}}^1$

素因数の和:6750

約数の個数: 16

約数和(自身を含む): 26982144

約数和(自身を除く): 5858657

約数列:

[1, 7, 11, 41, 77, 287, 451, 3157, 6691, 46837, 73601, 274331, 515207, 1920317, 3017641, 21123487]

約数ペア:

[(1, 21123487), (7, 3017641), (11, 1920317), (41, 515207), (77, 274331), (287, 73601), (451, 46837), (3157, 6691)]