20668180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79493}}^1$

素因数の和:79515

約数の個数: 24

約数和(自身を含む): 46742472

約数和(自身を除く): 26074292

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 79493, 158986, 317972, 397465, 794930, 1033409, 1589860, 2066818, 4133636, 5167045, 10334090, 20668180]

約数ペア:

[(1, 20668180), (2, 10334090), (4, 5167045), (5, 4133636), (10, 2066818), (13, 1589860), (20, 1033409), (26, 794930), (52, 397465), (65, 317972), (130, 158986), (260, 79493)]