21779289

素因数分解:

$3^2\times 7^1\times {\mathrm{523}}^1\times {\mathrm{661}}^1$

素因数の和:1197

約数の個数: 24

約数和(自身を含む): 36076352

約数和(自身を除く): 14297063

約数列:

[1, 3, 7, 9, 21, 63, 523, 661, 1569, 1983, 3661, 4627, 4707, 5949, 10983, 13881, 32949, 41643, 345703, 1037109, 2419921, 3111327, 7259763, 21779289]

約数ペア:

[(1, 21779289), (3, 7259763), (7, 3111327), (9, 2419921), (21, 1037109), (63, 345703), (523, 41643), (661, 32949), (1569, 13881), (1983, 10983), (3661, 5949), (4627, 4707)]