2780020

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1433}}^1$

素因数の和:1539

約数の個数: 24

約数和(自身を含む): 5902344

約数和(自身を除く): 3122324

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1433, 1940, 2866, 5732, 7165, 14330, 28660, 139001, 278002, 556004, 695005, 1390010, 2780020]

約数ペア:

[(1, 2780020), (2, 1390010), (4, 695005), (5, 556004), (10, 278002), (20, 139001), (97, 28660), (194, 14330), (388, 7165), (485, 5732), (970, 2866), (1433, 1940)]