80972120

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{5099}}^1$

素因数の和:5507

約数の個数: 32

約数和(自身を含む): 182682000

約数和(自身を除く): 101709880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 5099, 7940, 10198, 15880, 20396, 25495, 40792, 50990, 101980, 203960, 2024303, 4048606, 8097212, 10121515, 16194424, 20243030, 40486060, 80972120]

約数ペア:

[(1, 80972120), (2, 40486060), (4, 20243030), (5, 16194424), (8, 10121515), (10, 8097212), (20, 4048606), (40, 2024303), (397, 203960), (794, 101980), (1588, 50990), (1985, 40792), (3176, 25495), (3970, 20396), (5099, 15880), (7940, 10198)]