20128880

素因数分解:

$2^4\times 5^1\times {\mathrm{251611}}^1$

素因数の和:251624

約数の個数: 20

約数和(自身を含む): 46799832

約数和(自身を除く): 26670952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251611, 503222, 1006444, 1258055, 2012888, 2516110, 4025776, 5032220, 10064440, 20128880]

約数ペア:

[(1, 20128880), (2, 10064440), (4, 5032220), (5, 4025776), (8, 2516110), (10, 2012888), (16, 1258055), (20, 1006444), (40, 503222), (80, 251611)]