21293695

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{439}}^1$

素因数の和:642

約数の個数: 16

約数和(自身を含む): 26136000

約数和(自身を除く): 4842305

約数列:

[1, 5, 89, 109, 439, 445, 545, 2195, 9701, 39071, 47851, 48505, 195355, 239255, 4258739, 21293695]

約数ペア:

[(1, 21293695), (5, 4258739), (89, 239255), (109, 195355), (439, 48505), (445, 47851), (545, 39071), (2195, 9701)]