19972988

素因数分解:

$2^2\times 7^2\times {\mathrm{181}}^1\times {\mathrm{563}}^1$

素因数の和:762

約数の個数: 36

約数和(自身を含む): 40956552

約数和(自身を除く): 20983564

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 181, 196, 362, 563, 724, 1126, 1267, 2252, 2534, 3941, 5068, 7882, 8869, 15764, 17738, 27587, 35476, 55174, 101903, 110348, 203806, 407612, 713321, 1426642, 2853284, 4993247, 9986494, 19972988]

約数ペア:

[(1, 19972988), (2, 9986494), (4, 4993247), (7, 2853284), (14, 1426642), (28, 713321), (49, 407612), (98, 203806), (181, 110348), (196, 101903), (362, 55174), (563, 35476), (724, 27587), (1126, 17738), (1267, 15764), (2252, 8869), (2534, 7882), (3941, 5068)]