21278992

素因数分解:

$2^4\times 7^1\times {\mathrm{313}}^1\times {\mathrm{607}}^1$

素因数の和:935

約数の個数: 40

約数和(自身を含む): 47346176

約数和(自身を除く): 26067184

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 313, 607, 626, 1214, 1252, 2191, 2428, 2504, 4249, 4382, 4856, 5008, 8498, 8764, 9712, 16996, 17528, 33992, 35056, 67984, 189991, 379982, 759964, 1329937, 1519928, 2659874, 3039856, 5319748, 10639496, 21278992]

約数ペア:

[(1, 21278992), (2, 10639496), (4, 5319748), (7, 3039856), (8, 2659874), (14, 1519928), (16, 1329937), (28, 759964), (56, 379982), (112, 189991), (313, 67984), (607, 35056), (626, 33992), (1214, 17528), (1252, 16996), (2191, 9712), (2428, 8764), (2504, 8498), (4249, 5008), (4382, 4856)]