81521920

素因数分解:

$2^8\times 5^1\times {\mathrm{63689}}^1$

素因数の和:63710

約数の個数: 36

約数和(自身を含む): 195273540

約数和(自身を除く): 113751620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 63689, 127378, 254756, 318445, 509512, 636890, 1019024, 1273780, 2038048, 2547560, 4076096, 5095120, 8152192, 10190240, 16304384, 20380480, 40760960, 81521920]

約数ペア:

[(1, 81521920), (2, 40760960), (4, 20380480), (5, 16304384), (8, 10190240), (10, 8152192), (16, 5095120), (20, 4076096), (32, 2547560), (40, 2038048), (64, 1273780), (80, 1019024), (128, 636890), (160, 509512), (256, 318445), (320, 254756), (640, 127378), (1280, 63689)]