1984721920

素因数分解:

$2^{10}\times 5^1\times {\mathrm{387641}}^1$

素因数の和:387666

約数の個数: 44

約数和(自身を含む): 4761019044

約数和(自身を除く): 2776297124

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 5120, 387641, 775282, 1550564, 1938205, 3101128, 3876410, 6202256, 7752820, 12404512, 15505640, 24809024, 31011280, 49618048, 62022560, 99236096, 124045120, 198472192, 248090240, 396944384, 496180480, 992360960, 1984721920]

約数ペア:

[(1, 1984721920), (2, 992360960), (4, 496180480), (5, 396944384), (8, 248090240), (10, 198472192), (16, 124045120), (20, 99236096), (32, 62022560), (40, 49618048), (64, 31011280), (80, 24809024), (128, 15505640), (160, 12404512), (256, 7752820), (320, 6202256), (512, 3876410), (640, 3101128), (1024, 1938205), (1280, 1550564), (2560, 775282), (5120, 387641)]