21286719

素因数分解:

$3^4\times {\mathrm{109}}^1\times {\mathrm{2411}}^1$

素因数の和:2532

約数の個数: 20

約数和(自身を含む): 32103720

約数和(自身を除く): 10817001

約数列:

[1, 3, 9, 27, 81, 109, 327, 981, 2411, 2943, 7233, 8829, 21699, 65097, 195291, 262799, 788397, 2365191, 7095573, 21286719]

約数ペア:

[(1, 21286719), (3, 7095573), (9, 2365191), (27, 788397), (81, 262799), (109, 195291), (327, 65097), (981, 21699), (2411, 8829), (2943, 7233)]