20804557720

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{5149643}}^1$

素因数の和:5149755

約数の個数: 32

約数和(自身を含む): 47273731920

約数和(自身を除く): 26469174200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 5149643, 10299286, 20598572, 25748215, 41197144, 51496430, 102992860, 205985720, 520113943, 1040227886, 2080455772, 2600569715, 4160911544, 5201139430, 10402278860, 20804557720]

約数ペア:

[(1, 20804557720), (2, 10402278860), (4, 5201139430), (5, 4160911544), (8, 2600569715), (10, 2080455772), (20, 1040227886), (40, 520113943), (101, 205985720), (202, 102992860), (404, 51496430), (505, 41197144), (808, 25748215), (1010, 20598572), (2020, 10299286), (4040, 5149643)]