639085120

素因数分解:

$2^6\times 5^1\times {\mathrm{1997141}}^1$

素因数の和:1997158

約数の個数: 28

約数和(自身を含む): 1521822204

約数和(自身を除く): 882737084

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 1997141, 3994282, 7988564, 9985705, 15977128, 19971410, 31954256, 39942820, 63908512, 79885640, 127817024, 159771280, 319542560, 639085120]

約数ペア:

[(1, 639085120), (2, 319542560), (4, 159771280), (5, 127817024), (8, 79885640), (10, 63908512), (16, 39942820), (20, 31954256), (32, 19971410), (40, 15977128), (64, 9985705), (80, 7988564), (160, 3994282), (320, 1997141)]