81111070

素因数分解:

$2^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{20431}}^1$

素因数の和:20835

約数の個数: 16

約数和(自身を含む): 146374848

約数和(自身を除く): 65263778

約数列:

[1, 2, 5, 10, 397, 794, 1985, 3970, 20431, 40862, 102155, 204310, 8111107, 16222214, 40555535, 81111070]

約数ペア:

[(1, 81111070), (2, 40555535), (5, 16222214), (10, 8111107), (397, 204310), (794, 102155), (1985, 40862), (3970, 20431)]