81051760

素因数分解:

$2^4\times 5^1\times {\mathrm{349}}^1\times {\mathrm{2903}}^1$

素因数の和:3265

約数の個数: 40

約数和(自身を含む): 189050400

約数和(自身を除く): 107998640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 349, 698, 1396, 1745, 2792, 2903, 3490, 5584, 5806, 6980, 11612, 13960, 14515, 23224, 27920, 29030, 46448, 58060, 116120, 232240, 1013147, 2026294, 4052588, 5065735, 8105176, 10131470, 16210352, 20262940, 40525880, 81051760]

約数ペア:

[(1, 81051760), (2, 40525880), (4, 20262940), (5, 16210352), (8, 10131470), (10, 8105176), (16, 5065735), (20, 4052588), (40, 2026294), (80, 1013147), (349, 232240), (698, 116120), (1396, 58060), (1745, 46448), (2792, 29030), (2903, 27920), (3490, 23224), (5584, 14515), (5806, 13960), (6980, 11612)]