81205840

素因数分解:

$2^4\times 5^1\times {\mathrm{1015073}}^1$

素因数の和:1015086

約数の個数: 20

約数和(自身を含む): 188803764

約数和(自身を除く): 107597924

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1015073, 2030146, 4060292, 5075365, 8120584, 10150730, 16241168, 20301460, 40602920, 81205840]

約数ペア:

[(1, 81205840), (2, 40602920), (4, 20301460), (5, 16241168), (8, 10150730), (10, 8120584), (16, 5075365), (20, 4060292), (40, 2030146), (80, 1015073)]