21577204

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{109}}^1\times {\mathrm{409}}^1$

素因数の和:544

約数の個数: 36

約数和(自身を含む): 41988100

約数和(自身を除く): 20410896

約数列:

[1, 2, 4, 11, 22, 44, 109, 121, 218, 242, 409, 436, 484, 818, 1199, 1636, 2398, 4499, 4796, 8998, 13189, 17996, 26378, 44581, 49489, 52756, 89162, 98978, 178324, 197956, 490391, 980782, 1961564, 5394301, 10788602, 21577204]

約数ペア:

[(1, 21577204), (2, 10788602), (4, 5394301), (11, 1961564), (22, 980782), (44, 490391), (109, 197956), (121, 178324), (218, 98978), (242, 89162), (409, 52756), (436, 49489), (484, 44581), (818, 26378), (1199, 17996), (1636, 13189), (2398, 8998), (4499, 4796)]