21051279

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{311}}^1$

素因数の和:452

約数の個数: 32

約数和(自身を含む): 32947200

約数和(自身を除く): 11895921

約数列:

[1, 3, 9, 23, 27, 69, 109, 207, 311, 327, 621, 933, 981, 2507, 2799, 2943, 7153, 7521, 8397, 21459, 22563, 33899, 64377, 67689, 101697, 193131, 305091, 779677, 915273, 2339031, 7017093, 21051279]

約数ペア:

[(1, 21051279), (3, 7017093), (9, 2339031), (23, 915273), (27, 779677), (69, 305091), (109, 193131), (207, 101697), (311, 67689), (327, 64377), (621, 33899), (933, 22563), (981, 21459), (2507, 8397), (2799, 7521), (2943, 7153)]