20921271

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{58603}}^1$

素因数の和:58630

約数の個数: 16

約数和(自身を含む): 33755904

約数和(自身を除く): 12834633

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 58603, 175809, 410221, 996251, 1230663, 2988753, 6973757, 20921271]

約数ペア:

[(1, 20921271), (3, 6973757), (7, 2988753), (17, 1230663), (21, 996251), (51, 410221), (119, 175809), (357, 58603)]