19871956

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{401}}^1\times {\mathrm{953}}^1$

素因数の和:1371

約数の個数: 24

約数和(自身を含む): 37583784

約数和(自身を除く): 17711828

約数列:

[1, 2, 4, 13, 26, 52, 401, 802, 953, 1604, 1906, 3812, 5213, 10426, 12389, 20852, 24778, 49556, 382153, 764306, 1528612, 4967989, 9935978, 19871956]

約数ペア:

[(1, 19871956), (2, 9935978), (4, 4967989), (13, 1528612), (26, 764306), (52, 382153), (401, 49556), (802, 24778), (953, 20852), (1604, 12389), (1906, 10426), (3812, 5213)]