21017217

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{3877}}^1$

素因数の和:4032

約数の個数: 16

約数和(自身を含む): 30403520

約数和(自身を除く): 9386303

約数列:

[1, 3, 13, 39, 139, 417, 1807, 3877, 5421, 11631, 50401, 151203, 538903, 1616709, 7005739, 21017217]

約数ペア:

[(1, 21017217), (3, 7005739), (13, 1616709), (39, 538903), (139, 151203), (417, 50401), (1807, 11631), (3877, 5421)]