20467840

素因数分解:

$2^7\times 5^1\times {\mathrm{31981}}^1$

素因数の和:32000

約数の個数: 32

約数和(自身を含む): 48932460

約数和(自身を除く): 28464620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 31981, 63962, 127924, 159905, 255848, 319810, 511696, 639620, 1023392, 1279240, 2046784, 2558480, 4093568, 5116960, 10233920, 20467840]

約数ペア:

[(1, 20467840), (2, 10233920), (4, 5116960), (5, 4093568), (8, 2558480), (10, 2046784), (16, 1279240), (20, 1023392), (32, 639620), (40, 511696), (64, 319810), (80, 255848), (128, 159905), (160, 127924), (320, 63962), (640, 31981)]