81813640

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{70529}}^1$

素因数の和:70569

約数の個数: 32

約数和(自身を含む): 190431000

約数和(自身を除く): 108617360

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 70529, 141058, 282116, 352645, 564232, 705290, 1410580, 2045341, 2821160, 4090682, 8181364, 10226705, 16362728, 20453410, 40906820, 81813640]

約数ペア:

[(1, 81813640), (2, 40906820), (4, 20453410), (5, 16362728), (8, 10226705), (10, 8181364), (20, 4090682), (29, 2821160), (40, 2045341), (58, 1410580), (116, 705290), (145, 564232), (232, 352645), (290, 282116), (580, 141058), (1160, 70529)]