18972213

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{4463}}^1$

素因数の和:4588

約数の個数: 16

約数和(自身を含む): 27498240

約数和(自身を除く): 8526027

約数列:

[1, 3, 13, 39, 109, 327, 1417, 4251, 4463, 13389, 58019, 174057, 486467, 1459401, 6324071, 18972213]

約数ペア:

[(1, 18972213), (3, 6324071), (13, 1459401), (39, 486467), (109, 174057), (327, 58019), (1417, 13389), (4251, 4463)]