81741520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{145967}}^1$

素因数の和:145987

約数の個数: 40

約数和(自身を含む): 217200384

約数和(自身を除く): 135458864

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 145967, 291934, 583868, 729835, 1021769, 1167736, 1459670, 2043538, 2335472, 2919340, 4087076, 5108845, 5838680, 8174152, 10217690, 11677360, 16348304, 20435380, 40870760, 81741520]

約数ペア:

[(1, 81741520), (2, 40870760), (4, 20435380), (5, 16348304), (7, 11677360), (8, 10217690), (10, 8174152), (14, 5838680), (16, 5108845), (20, 4087076), (28, 2919340), (35, 2335472), (40, 2043538), (56, 1459670), (70, 1167736), (80, 1021769), (112, 729835), (140, 583868), (280, 291934), (560, 145967)]