19908520

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{3919}}^1$

素因数の和:4057

約数の個数: 32

約数和(自身を含む): 45158400

約数和(自身を除く): 25249880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 3919, 5080, 7838, 15676, 19595, 31352, 39190, 78380, 156760, 497713, 995426, 1990852, 2488565, 3981704, 4977130, 9954260, 19908520]

約数ペア:

[(1, 19908520), (2, 9954260), (4, 4977130), (5, 3981704), (8, 2488565), (10, 1990852), (20, 995426), (40, 497713), (127, 156760), (254, 78380), (508, 39190), (635, 31352), (1016, 19595), (1270, 15676), (2540, 7838), (3919, 5080)]