21513357

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{5651}}^1$

素因数の和:5710

約数の個数: 20

約数和(自身を含む): 32826816

約数和(自身を除く): 11313459

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 1269, 3807, 5651, 16953, 50859, 152577, 265597, 457731, 796791, 2390373, 7171119, 21513357]

約数ペア:

[(1, 21513357), (3, 7171119), (9, 2390373), (27, 796791), (47, 457731), (81, 265597), (141, 152577), (423, 50859), (1269, 16953), (3807, 5651)]