20513505

素因数分解:

$3^1\times 5^1\times {\mathrm{107}}^1\times {\mathrm{12781}}^1$

素因数の和:12896

約数の個数: 16

約数和(自身を含む): 33130944

約数和(自身を除く): 12617439

約数列:

[1, 3, 5, 15, 107, 321, 535, 1605, 12781, 38343, 63905, 191715, 1367567, 4102701, 6837835, 20513505]

約数ペア:

[(1, 20513505), (3, 6837835), (5, 4102701), (15, 1367567), (107, 191715), (321, 63905), (535, 38343), (1605, 12781)]