21017145

素因数分解:

$3^1\times 5^1\times {\mathrm{1087}}^1\times {\mathrm{1289}}^1$

素因数の和:2384

約数の個数: 16

約数和(自身を含む): 33684480

約数和(自身を除く): 12667335

約数列:

[1, 3, 5, 15, 1087, 1289, 3261, 3867, 5435, 6445, 16305, 19335, 1401143, 4203429, 7005715, 21017145]

約数ペア:

[(1, 21017145), (3, 7005715), (5, 4203429), (15, 1401143), (1087, 19335), (1289, 16305), (3261, 6445), (3867, 5435)]