21979713

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1777}}^1$

素因数の和:1837

約数の個数: 32

約数和(自身を含む): 36413440

約数和(自身を除く): 14433727

約数列:

[1, 3, 7, 19, 21, 31, 57, 93, 133, 217, 399, 589, 651, 1767, 1777, 4123, 5331, 12369, 12439, 33763, 37317, 55087, 101289, 165261, 236341, 385609, 709023, 1046653, 1156827, 3139959, 7326571, 21979713]

約数ペア:

[(1, 21979713), (3, 7326571), (7, 3139959), (19, 1156827), (21, 1046653), (31, 709023), (57, 385609), (93, 236341), (133, 165261), (217, 101289), (399, 55087), (589, 37317), (651, 33763), (1767, 12439), (1777, 12369), (4123, 5331)]