257800120

素因数分解:

$2^3\times 5^1\times {\mathrm{6445003}}^1$

素因数の和:6445014

約数の個数: 16

約数和(自身を含む): 580050360

約数和(自身を除く): 322250240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 6445003, 12890006, 25780012, 32225015, 51560024, 64450030, 128900060, 257800120]

約数ペア:

[(1, 257800120), (2, 128900060), (4, 64450030), (5, 51560024), (8, 32225015), (10, 25780012), (20, 12890006), (40, 6445003)]