19886217

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{571}}^1$

素因数の和:653

約数の個数: 32

約数和(自身を含む): 30750720

約数和(自身を除く): 10864503

約数列:

[1, 3, 13, 19, 39, 47, 57, 141, 247, 571, 611, 741, 893, 1713, 1833, 2679, 7423, 10849, 11609, 22269, 26837, 32547, 34827, 80511, 141037, 348881, 423111, 509903, 1046643, 1529709, 6628739, 19886217]

約数ペア:

[(1, 19886217), (3, 6628739), (13, 1529709), (19, 1046643), (39, 509903), (47, 423111), (57, 348881), (141, 141037), (247, 80511), (571, 34827), (611, 32547), (741, 26837), (893, 22269), (1713, 11609), (1833, 10849), (2679, 7423)]