20905542

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{83}}^1\times {\mathrm{1999}}^1$

素因数の和:2097

約数の個数: 48

約数和(自身を含む): 52416000

約数和(自身を除く): 31510458

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 83, 126, 166, 249, 498, 581, 747, 1162, 1494, 1743, 1999, 3486, 3998, 5229, 5997, 10458, 11994, 13993, 17991, 27986, 35982, 41979, 83958, 125937, 165917, 251874, 331834, 497751, 995502, 1161419, 1493253, 2322838, 2986506, 3484257, 6968514, 10452771, 20905542]

約数ペア:

[(1, 20905542), (2, 10452771), (3, 6968514), (6, 3484257), (7, 2986506), (9, 2322838), (14, 1493253), (18, 1161419), (21, 995502), (42, 497751), (63, 331834), (83, 251874), (126, 165917), (166, 125937), (249, 83958), (498, 41979), (581, 35982), (747, 27986), (1162, 17991), (1494, 13993), (1743, 11994), (1999, 10458), (3486, 5997), (3998, 5229)]