39996760

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{1009}}^1$

素因数の和:2011

約数の個数: 32

約数和(自身を含む): 90172800

約数和(自身を除く): 50176040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 1009, 1982, 2018, 3964, 4036, 4955, 5045, 7928, 8072, 9910, 10090, 19820, 20180, 39640, 40360, 999919, 1999838, 3999676, 4999595, 7999352, 9999190, 19998380, 39996760]

約数ペア:

[(1, 39996760), (2, 19998380), (4, 9999190), (5, 7999352), (8, 4999595), (10, 3999676), (20, 1999838), (40, 999919), (991, 40360), (1009, 39640), (1982, 20180), (2018, 19820), (3964, 10090), (4036, 9910), (4955, 8072), (5045, 7928)]