21163820

素因数分解:

$2^2\times 5^1\times {\mathrm{887}}^1\times {\mathrm{1193}}^1$

素因数の和:2089

約数の個数: 24

約数和(自身を含む): 44531424

約数和(自身を除く): 23367604

約数列:

[1, 2, 4, 5, 10, 20, 887, 1193, 1774, 2386, 3548, 4435, 4772, 5965, 8870, 11930, 17740, 23860, 1058191, 2116382, 4232764, 5290955, 10581910, 21163820]

約数ペア:

[(1, 21163820), (2, 10581910), (4, 5290955), (5, 4232764), (10, 2116382), (20, 1058191), (887, 23860), (1193, 17740), (1774, 11930), (2386, 8870), (3548, 5965), (4435, 4772)]