21245565

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128761}}^1$

素因数の和:128780

約数の個数: 16

約数和(自身を含む): 37083456

約数和(自身を除く): 15837891

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128761, 386283, 643805, 1416371, 1931415, 4249113, 7081855, 21245565]

約数ペア:

[(1, 21245565), (3, 7081855), (5, 4249113), (11, 1931415), (15, 1416371), (33, 643805), (55, 386283), (165, 128761)]