19871982

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{521}}^1$

素因数の和:705

約数の個数: 48

約数和(自身を含む): 46741968

約数和(自身を除く): 26869986

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 163, 234, 326, 489, 521, 978, 1042, 1467, 1563, 2119, 2934, 3126, 4238, 4689, 6357, 6773, 9378, 12714, 13546, 19071, 20319, 38142, 40638, 60957, 84923, 121914, 169846, 254769, 509538, 764307, 1103999, 1528614, 2207998, 3311997, 6623994, 9935991, 19871982]

約数ペア:

[(1, 19871982), (2, 9935991), (3, 6623994), (6, 3311997), (9, 2207998), (13, 1528614), (18, 1103999), (26, 764307), (39, 509538), (78, 254769), (117, 169846), (163, 121914), (234, 84923), (326, 60957), (489, 40638), (521, 38142), (978, 20319), (1042, 19071), (1467, 13546), (1563, 12714), (2119, 9378), (2934, 6773), (3126, 6357), (4238, 4689)]