21760720

素因数分解:

$2^4\times 5^1\times {\mathrm{272009}}^1$

素因数の和:272022

約数の個数: 20

約数和(自身を含む): 50593860

約数和(自身を除く): 28833140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272009, 544018, 1088036, 1360045, 2176072, 2720090, 4352144, 5440180, 10880360, 21760720]

約数ペア:

[(1, 21760720), (2, 10880360), (4, 5440180), (5, 4352144), (8, 2720090), (10, 2176072), (16, 1360045), (20, 1088036), (40, 544018), (80, 272009)]