21877165

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^2\times {\mathrm{157}}^1$

素因数の和:253

約数の個数: 24

約数和(自身を含む): 28240920

約数和(自身を除く): 6363755

約数列:

[1, 5, 29, 31, 145, 155, 157, 785, 899, 961, 4495, 4553, 4805, 4867, 22765, 24335, 27869, 139345, 141143, 150877, 705715, 754385, 4375433, 21877165]

約数ペア:

[(1, 21877165), (5, 4375433), (29, 754385), (31, 705715), (145, 150877), (155, 141143), (157, 139345), (785, 27869), (899, 24335), (961, 22765), (4495, 4867), (4553, 4805)]