20987840

素因数分解:

$2^6\times 5^1\times {\mathrm{65587}}^1$

素因数の和:65604

約数の個数: 28

約数和(自身を含む): 49978056

約数和(自身を除く): 28990216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 65587, 131174, 262348, 327935, 524696, 655870, 1049392, 1311740, 2098784, 2623480, 4197568, 5246960, 10493920, 20987840]

約数ペア:

[(1, 20987840), (2, 10493920), (4, 5246960), (5, 4197568), (8, 2623480), (10, 2098784), (16, 1311740), (20, 1049392), (32, 655870), (40, 524696), (64, 327935), (80, 262348), (160, 131174), (320, 65587)]