21276513

素因数分解:

$3^4\times {\mathrm{193}}^1\times {\mathrm{1361}}^1$

素因数の和:1566

約数の個数: 20

約数和(自身を含む): 31971588

約数和(自身を除く): 10695075

約数列:

[1, 3, 9, 27, 81, 193, 579, 1361, 1737, 4083, 5211, 12249, 15633, 36747, 110241, 262673, 788019, 2364057, 7092171, 21276513]

約数ペア:

[(1, 21276513), (3, 7092171), (9, 2364057), (27, 788019), (81, 262673), (193, 110241), (579, 36747), (1361, 15633), (1737, 12249), (4083, 5211)]