21701211

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{397}}^1$

素因数の和:563

約数の個数: 32

約数和(自身を含む): 35151360

約数和(自身を除く): 13450149

約数列:

[1, 3, 7, 19, 21, 57, 133, 137, 397, 399, 411, 959, 1191, 2603, 2779, 2877, 7543, 7809, 8337, 18221, 22629, 52801, 54389, 54663, 158403, 163167, 380723, 1033391, 1142169, 3100173, 7233737, 21701211]

約数ペア:

[(1, 21701211), (3, 7233737), (7, 3100173), (19, 1142169), (21, 1033391), (57, 380723), (133, 163167), (137, 158403), (397, 54663), (399, 54389), (411, 52801), (959, 22629), (1191, 18221), (2603, 8337), (2779, 7809), (2877, 7543)]