21219385

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{1999}}^1$

素因数の和:2208

約数の個数: 16

約数和(自身を含む): 27936000

約数和(自身を除く): 6716615

約数列:

[1, 5, 11, 55, 193, 965, 1999, 2123, 9995, 10615, 21989, 109945, 385807, 1929035, 4243877, 21219385]

約数ペア:

[(1, 21219385), (5, 4243877), (11, 1929035), (55, 385807), (193, 109945), (965, 21989), (1999, 10615), (2123, 9995)]