21528273

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1709}}^1$

素因数の和:1761

約数の個数: 32

約数和(自身を含む): 34473600

約数和(自身を除く): 12945327

約数列:

[1, 3, 13, 17, 19, 39, 51, 57, 221, 247, 323, 663, 741, 969, 1709, 4199, 5127, 12597, 22217, 29053, 32471, 66651, 87159, 97413, 377689, 422123, 552007, 1133067, 1266369, 1656021, 7176091, 21528273]

約数ペア:

[(1, 21528273), (3, 7176091), (13, 1656021), (17, 1266369), (19, 1133067), (39, 552007), (51, 422123), (57, 377689), (221, 97413), (247, 87159), (323, 66651), (663, 32471), (741, 29053), (969, 22217), (1709, 12597), (4199, 5127)]