81028421680

素因数分解:

$2^4\times 5^1\times {\mathrm{1012855271}}^1$

素因数の和:1012855284

約数の個数: 20

約数和(自身を含む): 188391080592

約数和(自身を除く): 107362658912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1012855271, 2025710542, 4051421084, 5064276355, 8102842168, 10128552710, 16205684336, 20257105420, 40514210840, 81028421680]

約数ペア:

[(1, 81028421680), (2, 40514210840), (4, 20257105420), (5, 16205684336), (8, 10128552710), (10, 8102842168), (16, 5064276355), (20, 4051421084), (40, 2025710542), (80, 1012855271)]