21958525

素因数分解:

$5^2\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:309

約数の個数: 24

約数和(自身を含む): 28123200

約数和(自身を除く): 6164675

約数列:

[1, 5, 25, 71, 89, 139, 355, 445, 695, 1775, 2225, 3475, 6319, 9869, 12371, 31595, 49345, 61855, 157975, 246725, 309275, 878341, 4391705, 21958525]

約数ペア:

[(1, 21958525), (5, 4391705), (25, 878341), (71, 309275), (89, 246725), (139, 157975), (355, 61855), (445, 49345), (695, 31595), (1775, 12371), (2225, 9869), (3475, 6319)]