21656815

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{1187}}^1$

素因数の和:1322

約数の個数: 16

約数和(自身を含む): 26943840

約数和(自身を除く): 5287025

約数列:

[1, 5, 41, 89, 205, 445, 1187, 3649, 5935, 18245, 48667, 105643, 243335, 528215, 4331363, 21656815]

約数ペア:

[(1, 21656815), (5, 4331363), (41, 528215), (89, 243335), (205, 105643), (445, 48667), (1187, 18245), (3649, 5935)]