18979220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72997}}^1$

素因数の和:73019

約数の個数: 24

約数和(自身を含む): 42922824

約数和(自身を除く): 23943604

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72997, 145994, 291988, 364985, 729970, 948961, 1459940, 1897922, 3795844, 4744805, 9489610, 18979220]

約数ペア:

[(1, 18979220), (2, 9489610), (4, 4744805), (5, 3795844), (10, 1897922), (13, 1459940), (20, 948961), (26, 729970), (52, 364985), (65, 291988), (130, 145994), (260, 72997)]