81195440

素因数分解:

$2^4\times 5^1\times {\mathrm{577}}^1\times {\mathrm{1759}}^1$

素因数の和:2349

約数の個数: 40

約数和(自身を含む): 189214080

約数和(自身を除く): 108018640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 577, 1154, 1759, 2308, 2885, 3518, 4616, 5770, 7036, 8795, 9232, 11540, 14072, 17590, 23080, 28144, 35180, 46160, 70360, 140720, 1014943, 2029886, 4059772, 5074715, 8119544, 10149430, 16239088, 20298860, 40597720, 81195440]

約数ペア:

[(1, 81195440), (2, 40597720), (4, 20298860), (5, 16239088), (8, 10149430), (10, 8119544), (16, 5074715), (20, 4059772), (40, 2029886), (80, 1014943), (577, 140720), (1154, 70360), (1759, 46160), (2308, 35180), (2885, 28144), (3518, 23080), (4616, 17590), (5770, 14072), (7036, 11540), (8795, 9232)]