81910825

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{509}}^1$

素因数の和:717

約数の個数: 24

約数和(自身を含む): 104915160

約数和(自身を除く): 23004335

約数列:

[1, 5, 25, 41, 157, 205, 509, 785, 1025, 2545, 3925, 6437, 12725, 20869, 32185, 79913, 104345, 160925, 399565, 521725, 1997825, 3276433, 16382165, 81910825]

約数ペア:

[(1, 81910825), (5, 16382165), (25, 3276433), (41, 1997825), (157, 521725), (205, 399565), (509, 160925), (785, 104345), (1025, 79913), (2545, 32185), (3925, 20869), (6437, 12725)]