20139988

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 40219200

約数和(自身を除く): 20079212

約数列:

[1, 2, 4, 11, 22, 37, 44, 74, 89, 139, 148, 178, 278, 356, 407, 556, 814, 979, 1529, 1628, 1958, 3058, 3293, 3916, 5143, 6116, 6586, 10286, 12371, 13172, 20572, 24742, 36223, 49484, 56573, 72446, 113146, 136081, 144892, 226292, 272162, 457727, 544324, 915454, 1830908, 5034997, 10069994, 20139988]

約数ペア:

[(1, 20139988), (2, 10069994), (4, 5034997), (11, 1830908), (22, 915454), (37, 544324), (44, 457727), (74, 272162), (89, 226292), (139, 144892), (148, 136081), (178, 113146), (278, 72446), (356, 56573), (407, 49484), (556, 36223), (814, 24742), (979, 20572), (1529, 13172), (1628, 12371), (1958, 10286), (3058, 6586), (3293, 6116), (3916, 5143)]