635840

素因数分解:

$2^6\times 5^1\times {\mathrm{1987}}^1$

素因数の和:2004

約数の個数: 28

約数和(自身を含む): 1514856

約数和(自身を除く): 879016

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 1987, 3974, 7948, 9935, 15896, 19870, 31792, 39740, 63584, 79480, 127168, 158960, 317920, 635840]

約数ペア:

[(1, 635840), (2, 317920), (4, 158960), (5, 127168), (8, 79480), (10, 63584), (16, 39740), (20, 31792), (32, 19870), (40, 15896), (64, 9935), (80, 7948), (160, 3974), (320, 1987)]