80639420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{212209}}^1$

素因数の和:212237

約数の個数: 24

約数和(自身を含む): 178256400

約数和(自身を除く): 97616980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 212209, 424418, 848836, 1061045, 2122090, 4031971, 4244180, 8063942, 16127884, 20159855, 40319710, 80639420]

約数ペア:

[(1, 80639420), (2, 40319710), (4, 20159855), (5, 16127884), (10, 8063942), (19, 4244180), (20, 4031971), (38, 2122090), (76, 1061045), (95, 848836), (190, 424418), (380, 212209)]