19918880

素因数分解:

$2^5\times 5^1\times {\mathrm{124493}}^1$

素因数の和:124508

約数の個数: 24

約数和(自身を含む): 47058732

約数和(自身を除く): 27139852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 124493, 248986, 497972, 622465, 995944, 1244930, 1991888, 2489860, 3983776, 4979720, 9959440, 19918880]

約数ペア:

[(1, 19918880), (2, 9959440), (4, 4979720), (5, 3983776), (8, 2489860), (10, 1991888), (16, 1244930), (20, 995944), (32, 622465), (40, 497972), (80, 248986), (160, 124493)]