21176721

素因数分解:

$3^7\times {\mathrm{23}}^1\times {\mathrm{421}}^1$

素因数の和:465

約数の個数: 32

約数和(自身を含む): 33219840

約数和(自身を除く): 12043119

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 243, 421, 621, 729, 1263, 1863, 2187, 3789, 5589, 9683, 11367, 16767, 29049, 34101, 50301, 87147, 102303, 261441, 306909, 784323, 920727, 2352969, 7058907, 21176721]

約数ペア:

[(1, 21176721), (3, 7058907), (9, 2352969), (23, 920727), (27, 784323), (69, 306909), (81, 261441), (207, 102303), (243, 87147), (421, 50301), (621, 34101), (729, 29049), (1263, 16767), (1863, 11367), (2187, 9683), (3789, 5589)]