7828780

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1987}}^1$

素因数の和:2193

約数の個数: 24

約数和(自身を含む): 16532208

約数和(自身を除く): 8703428

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 1987, 3940, 3974, 7948, 9935, 19870, 39740, 391439, 782878, 1565756, 1957195, 3914390, 7828780]

約数ペア:

[(1, 7828780), (2, 3914390), (4, 1957195), (5, 1565756), (10, 782878), (20, 391439), (197, 39740), (394, 19870), (788, 9935), (985, 7948), (1970, 3974), (1987, 3940)]