644320

素因数分解:

$2^5\times 5^1\times {\mathrm{4027}}^1$

素因数の和:4042

約数の個数: 24

約数和(自身を含む): 1522584

約数和(自身を除く): 878264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 4027, 8054, 16108, 20135, 32216, 40270, 64432, 80540, 128864, 161080, 322160, 644320]

約数ペア:

[(1, 644320), (2, 322160), (4, 161080), (5, 128864), (8, 80540), (10, 64432), (16, 40270), (20, 32216), (32, 20135), (40, 16108), (80, 8054), (160, 4027)]