21255140

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{2399}}^1$

素因数の和:2851

約数の個数: 24

約数和(自身を含む): 44755200

約数和(自身を除く): 23500060

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1772, 2215, 2399, 4430, 4798, 8860, 9596, 11995, 23990, 47980, 1062757, 2125514, 4251028, 5313785, 10627570, 21255140]

約数ペア:

[(1, 21255140), (2, 10627570), (4, 5313785), (5, 4251028), (10, 2125514), (20, 1062757), (443, 47980), (886, 23990), (1772, 11995), (2215, 9596), (2399, 8860), (4430, 4798)]