21558460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13999}}^1$

素因数の和:14026

約数の個数: 48

約数和(自身を含む): 56448000

約数和(自身を除く): 34889540

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13999, 27998, 55996, 69995, 97993, 139990, 153989, 195986, 279980, 307978, 391972, 489965, 615956, 769945, 979930, 1077923, 1539890, 1959860, 2155846, 3079780, 4311692, 5389615, 10779230, 21558460]

約数ペア:

[(1, 21558460), (2, 10779230), (4, 5389615), (5, 4311692), (7, 3079780), (10, 2155846), (11, 1959860), (14, 1539890), (20, 1077923), (22, 979930), (28, 769945), (35, 615956), (44, 489965), (55, 391972), (70, 307978), (77, 279980), (110, 195986), (140, 153989), (154, 139990), (220, 97993), (308, 69995), (385, 55996), (770, 27998), (1540, 13999)]