7921221

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{647}}^1$

素因数の和:721

約数の個数: 32

約数和(自身を含む): 13436928

約数和(自身を除く): 5515707

約数列:

[1, 3, 7, 11, 21, 33, 53, 77, 159, 231, 371, 583, 647, 1113, 1749, 1941, 4081, 4529, 7117, 12243, 13587, 21351, 34291, 49819, 102873, 149457, 240037, 377201, 720111, 1131603, 2640407, 7921221]

約数ペア:

[(1, 7921221), (3, 2640407), (7, 1131603), (11, 720111), (21, 377201), (33, 240037), (53, 149457), (77, 102873), (159, 49819), (231, 34291), (371, 21351), (583, 13587), (647, 12243), (1113, 7117), (1749, 4529), (1941, 4081)]