20799220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79997}}^1$

素因数の和:80019

約数の個数: 24

約数和(自身を含む): 47038824

約数和(自身を除く): 26239604

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 79997, 159994, 319988, 399985, 799970, 1039961, 1599940, 2079922, 4159844, 5199805, 10399610, 20799220]

約数ペア:

[(1, 20799220), (2, 10399610), (4, 5199805), (5, 4159844), (10, 2079922), (13, 1599940), (20, 1039961), (26, 799970), (52, 399985), (65, 319988), (130, 159994), (260, 79997)]