81013040

素因数分解:

$2^4\times 5^1\times {\mathrm{1012663}}^1$

素因数の和:1012676

約数の個数: 20

約数和(自身を含む): 188355504

約数和(自身を除く): 107342464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1012663, 2025326, 4050652, 5063315, 8101304, 10126630, 16202608, 20253260, 40506520, 81013040]

約数ペア:

[(1, 81013040), (2, 40506520), (4, 20253260), (5, 16202608), (8, 10126630), (10, 8101304), (16, 5063315), (20, 4050652), (40, 2025326), (80, 1012663)]