21361691

素因数分解:

${\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{499}}^1$

素因数の和:638

約数の個数: 16

約数和(自身を含む): 23940000

約数和(自身を除く): 2578309

約数列:

[1, 13, 37, 89, 481, 499, 1157, 3293, 6487, 18463, 42809, 44411, 240019, 577343, 1643207, 21361691]

約数ペア:

[(1, 21361691), (13, 1643207), (37, 577343), (89, 240019), (481, 44411), (499, 42809), (1157, 18463), (3293, 6487)]