21856989

素因数分解:

$3^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{1931}}^1$

素因数の和:1966

約数の個数: 32

約数和(自身を含む): 37094400

約数和(自身を除く): 15237411

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 147, 231, 343, 539, 1029, 1617, 1931, 3773, 5793, 11319, 13517, 21241, 40551, 63723, 94619, 148687, 283857, 446061, 662333, 1040809, 1986999, 3122427, 7285663, 21856989]

約数ペア:

[(1, 21856989), (3, 7285663), (7, 3122427), (11, 1986999), (21, 1040809), (33, 662333), (49, 446061), (77, 283857), (147, 148687), (231, 94619), (343, 63723), (539, 40551), (1029, 21241), (1617, 13517), (1931, 11319), (3773, 5793)]