20128540

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24547}}^1$

素因数の和:24597

約数の個数: 24

約数和(自身を含む): 43302672

約数和(自身を除く): 23174132

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 24547, 49094, 98188, 122735, 245470, 490940, 1006427, 2012854, 4025708, 5032135, 10064270, 20128540]

約数ペア:

[(1, 20128540), (2, 10064270), (4, 5032135), (5, 4025708), (10, 2012854), (20, 1006427), (41, 490940), (82, 245470), (164, 122735), (205, 98188), (410, 49094), (820, 24547)]