81135920

素因数分解:

$2^4\times 5^1\times {\mathrm{1014199}}^1$

素因数の和:1014212

約数の個数: 20

約数和(自身を含む): 188641200

約数和(自身を除く): 107505280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1014199, 2028398, 4056796, 5070995, 8113592, 10141990, 16227184, 20283980, 40567960, 81135920]

約数ペア:

[(1, 81135920), (2, 40567960), (4, 20283980), (5, 16227184), (8, 10141990), (10, 8113592), (16, 5070995), (20, 4056796), (40, 2028398), (80, 1014199)]