80721865

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{19381}}^1$

素因数の和:19417

約数の個数: 24

約数和(自身を含む): 119315592

約数和(自身を除く): 38593727

約数列:

[1, 5, 7, 17, 35, 49, 85, 119, 245, 595, 833, 4165, 19381, 96905, 135667, 329477, 678335, 949669, 1647385, 2306339, 4748345, 11531695, 16144373, 80721865]

約数ペア:

[(1, 80721865), (5, 16144373), (7, 11531695), (17, 4748345), (35, 2306339), (49, 1647385), (85, 949669), (119, 678335), (245, 329477), (595, 135667), (833, 96905), (4165, 19381)]