19991888

素因数分解:

$2^4\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1733}}^1$

素因数の和:1851

約数の個数: 40

約数和(自身を含む): 44723328

約数和(自身を除く): 24731440

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 103, 112, 206, 412, 721, 824, 1442, 1648, 1733, 2884, 3466, 5768, 6932, 11536, 12131, 13864, 24262, 27728, 48524, 97048, 178499, 194096, 356998, 713996, 1249493, 1427992, 2498986, 2855984, 4997972, 9995944, 19991888]

約数ペア:

[(1, 19991888), (2, 9995944), (4, 4997972), (7, 2855984), (8, 2498986), (14, 1427992), (16, 1249493), (28, 713996), (56, 356998), (103, 194096), (112, 178499), (206, 97048), (412, 48524), (721, 27728), (824, 24262), (1442, 13864), (1648, 12131), (1733, 11536), (2884, 6932), (3466, 5768)]