21104787

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{139}}^1$

素因数の和:303

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10828653

約数列:

[1, 3, 11, 33, 43, 107, 129, 139, 321, 417, 473, 1177, 1419, 1529, 3531, 4587, 4601, 5977, 13803, 14873, 17931, 44619, 50611, 65747, 151833, 163603, 197241, 490809, 639539, 1918617, 7034929, 21104787]

約数ペア:

[(1, 21104787), (3, 7034929), (11, 1918617), (33, 639539), (43, 490809), (107, 197241), (129, 163603), (139, 151833), (321, 65747), (417, 50611), (473, 44619), (1177, 17931), (1419, 14873), (1529, 13803), (3531, 5977), (4587, 4601)]