839580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{1999}}^1$

素因数の和:2018

約数の個数: 48

約数和(自身を含む): 2688000

約数和(自身を除く): 1848420

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 1999, 3998, 5997, 7996, 9995, 11994, 13993, 19990, 23988, 27986, 29985, 39980, 41979, 55972, 59970, 69965, 83958, 119940, 139930, 167916, 209895, 279860, 419790, 839580]

約数ペア:

[(1, 839580), (2, 419790), (3, 279860), (4, 209895), (5, 167916), (6, 139930), (7, 119940), (10, 83958), (12, 69965), (14, 59970), (15, 55972), (20, 41979), (21, 39980), (28, 29985), (30, 27986), (35, 23988), (42, 19990), (60, 13993), (70, 11994), (84, 9995), (105, 7996), (140, 5997), (210, 3998), (420, 1999)]