51215440

素因数分解:

$2^4\times 5^1\times {\mathrm{640193}}^1$

素因数の和:640206

約数の個数: 20

約数和(自身を含む): 119076084

約数和(自身を除く): 67860644

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 640193, 1280386, 2560772, 3200965, 5121544, 6401930, 10243088, 12803860, 25607720, 51215440]

約数ペア:

[(1, 51215440), (2, 25607720), (4, 12803860), (5, 10243088), (8, 6401930), (10, 5121544), (16, 3200965), (20, 2560772), (40, 1280386), (80, 640193)]