20917485

素因数分解:

$3^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2203}}^1$

素因数の和:2425

約数の個数: 24

約数和(自身を含む): 36445344

約数和(自身を除く): 15527859

約数列:

[1, 3, 5, 9, 15, 45, 211, 633, 1055, 1899, 2203, 3165, 6609, 9495, 11015, 19827, 33045, 99135, 464833, 1394499, 2324165, 4183497, 6972495, 20917485]

約数ペア:

[(1, 20917485), (3, 6972495), (5, 4183497), (9, 2324165), (15, 1394499), (45, 464833), (211, 99135), (633, 33045), (1055, 19827), (1899, 11015), (2203, 9495), (3165, 6609)]