21005335

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{3631}}^1$

素因数の和:3738

約数の個数: 16

約数和(自身を含む): 27457920

約数和(自身を除く): 6452585

約数列:

[1, 5, 13, 65, 89, 445, 1157, 3631, 5785, 18155, 47203, 236015, 323159, 1615795, 4201067, 21005335]

約数ペア:

[(1, 21005335), (5, 4201067), (13, 1615795), (65, 323159), (89, 236015), (445, 47203), (1157, 18155), (3631, 5785)]