4257980

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1009}}^1$

素因数の和:1229

約数の個数: 24

約数和(自身を含む): 8993040

約数和(自身を除く): 4735060

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1009, 1055, 2018, 2110, 4036, 4220, 5045, 10090, 20180, 212899, 425798, 851596, 1064495, 2128990, 4257980]

約数ペア:

[(1, 4257980), (2, 2128990), (4, 1064495), (5, 851596), (10, 425798), (20, 212899), (211, 20180), (422, 10090), (844, 5045), (1009, 4220), (1055, 4036), (2018, 2110)]