21748671

素因数分解:

$3^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{4729}}^1$

素因数の和:4815

約数の個数: 24

約数和(自身を含む): 36402080

約数和(自身を除く): 14653409

約数列:

[1, 3, 7, 9, 21, 63, 73, 219, 511, 657, 1533, 4599, 4729, 14187, 33103, 42561, 99309, 297927, 345217, 1035651, 2416519, 3106953, 7249557, 21748671]

約数ペア:

[(1, 21748671), (3, 7249557), (7, 3106953), (9, 2416519), (21, 1035651), (63, 345217), (73, 297927), (219, 99309), (511, 42561), (657, 33103), (1533, 14187), (4599, 4729)]