2821540

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1987}}^1$

素因数の和:2067

約数の個数: 24

約数和(自身を含む): 6011712

約数和(自身を除く): 3190172

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 1987, 3974, 7948, 9935, 19870, 39740, 141077, 282154, 564308, 705385, 1410770, 2821540]

約数ペア:

[(1, 2821540), (2, 1410770), (4, 705385), (5, 564308), (10, 282154), (20, 141077), (71, 39740), (142, 19870), (284, 9935), (355, 7948), (710, 3974), (1420, 1987)]