20660560

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2557}}^1$

素因数の和:2671

約数の個数: 40

約数和(自身を含む): 48530376

約数和(自身を除く): 27869816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2557, 4040, 5114, 8080, 10228, 12785, 20456, 25570, 40912, 51140, 102280, 204560, 258257, 516514, 1033028, 1291285, 2066056, 2582570, 4132112, 5165140, 10330280, 20660560]

約数ペア:

[(1, 20660560), (2, 10330280), (4, 5165140), (5, 4132112), (8, 2582570), (10, 2066056), (16, 1291285), (20, 1033028), (40, 516514), (80, 258257), (101, 204560), (202, 102280), (404, 51140), (505, 40912), (808, 25570), (1010, 20456), (1616, 12785), (2020, 10228), (2557, 8080), (4040, 5114)]