20128720

素因数分解:

$2^4\times 5^1\times {\mathrm{251609}}^1$

素因数の和:251622

約数の個数: 20

約数和(自身を含む): 46799460

約数和(自身を除く): 26670740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251609, 503218, 1006436, 1258045, 2012872, 2516090, 4025744, 5032180, 10064360, 20128720]

約数ペア:

[(1, 20128720), (2, 10064360), (4, 5032180), (5, 4025744), (8, 2516090), (10, 2012872), (16, 1258045), (20, 1006436), (40, 503218), (80, 251609)]