20979765

素因数分解:

$3^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{3671}}^1$

素因数の和:3809

約数の個数: 24

約数和(自身を含む): 36661248

約数和(自身を除く): 15681483

約数列:

[1, 3, 5, 9, 15, 45, 127, 381, 635, 1143, 1905, 3671, 5715, 11013, 18355, 33039, 55065, 165195, 466217, 1398651, 2331085, 4195953, 6993255, 20979765]

約数ペア:

[(1, 20979765), (3, 6993255), (5, 4195953), (9, 2331085), (15, 1398651), (45, 466217), (127, 165195), (381, 55065), (635, 33039), (1143, 18355), (1905, 11013), (3671, 5715)]