21000983994

素因数分解:

$2^1\times 3^3\times {\mathrm{37}}^1\times {\mathrm{1361}}^1\times {\mathrm{7723}}^1$

素因数の和:9132

約数の個数: 64

約数和(自身を含む): 47971601280

約数和(自身を除く): 26970617286

約数列:

[1, 2, 3, 6, 9, 18, 27, 37, 54, 74, 111, 222, 333, 666, 999, 1361, 1998, 2722, 4083, 7723, 8166, 12249, 15446, 23169, 24498, 36747, 46338, 50357, 69507, 73494, 100714, 139014, 151071, 208521, 285751, 302142, 417042, 453213, 571502, 857253, 906426, 1359639, 1714506, 2571759, 2719278, 5143518, 7715277, 10511003, 15430554, 21022006, 31533009, 63066018, 94599027, 189198054, 283797081, 388907111, 567594162, 777814222, 1166721333, 2333442666, 3500163999, 7000327998, 10500491997, 21000983994]

約数ペア:

[(1, 21000983994), (2, 10500491997), (3, 7000327998), (6, 3500163999), (9, 2333442666), (18, 1166721333), (27, 777814222), (37, 567594162), (54, 388907111), (74, 283797081), (111, 189198054), (222, 94599027), (333, 63066018), (666, 31533009), (999, 21022006), (1361, 15430554), (1998, 10511003), (2722, 7715277), (4083, 5143518), (7723, 2719278), (8166, 2571759), (12249, 1714506), (15446, 1359639), (23169, 906426), (24498, 857253), (36747, 571502), (46338, 453213), (50357, 417042), (69507, 302142), (73494, 285751), (100714, 208521), (139014, 151071)]