21540220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82847}}^1$

素因数の和:82869

約数の個数: 24

約数和(自身を含む): 48714624

約数和(自身を除く): 27174404

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82847, 165694, 331388, 414235, 828470, 1077011, 1656940, 2154022, 4308044, 5385055, 10770110, 21540220]

約数ペア:

[(1, 21540220), (2, 10770110), (4, 5385055), (5, 4308044), (10, 2154022), (13, 1656940), (20, 1077011), (26, 828470), (52, 414235), (65, 331388), (130, 165694), (260, 82847)]