21820004

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{76831}}^1$

素因数の和:76906

約数の個数: 12

約数和(自身を含む): 38723328

約数和(自身を除く): 16903324

約数列:

[1, 2, 4, 71, 142, 284, 76831, 153662, 307324, 5455001, 10910002, 21820004]

約数ペア:

[(1, 21820004), (2, 10910002), (4, 5455001), (71, 307324), (142, 153662), (284, 76831)]