18610690

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1999}}^1$

素因数の和:2039

約数の個数: 48

約数和(自身を含む): 41040000

約数和(自身を除く): 22429310

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 49, 70, 95, 98, 133, 190, 245, 266, 490, 665, 931, 1330, 1862, 1999, 3998, 4655, 9310, 9995, 13993, 19990, 27986, 37981, 69965, 75962, 97951, 139930, 189905, 195902, 265867, 379810, 489755, 531734, 979510, 1329335, 1861069, 2658670, 3722138, 9305345, 18610690]

約数ペア:

[(1, 18610690), (2, 9305345), (5, 3722138), (7, 2658670), (10, 1861069), (14, 1329335), (19, 979510), (35, 531734), (38, 489755), (49, 379810), (70, 265867), (95, 195902), (98, 189905), (133, 139930), (190, 97951), (245, 75962), (266, 69965), (490, 37981), (665, 27986), (931, 19990), (1330, 13993), (1862, 9995), (1999, 9310), (3998, 4655)]