19966986

素因数分解:

$2^1\times 3^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{499}}^1$

素因数の和:545

約数の個数: 80

約数和(自身を含む): 50820000

約数和(自身を除く): 30853014

約数列:

[1, 2, 3, 6, 9, 13, 18, 19, 26, 27, 38, 39, 54, 57, 78, 81, 114, 117, 162, 171, 234, 247, 342, 351, 494, 499, 513, 702, 741, 998, 1026, 1053, 1482, 1497, 1539, 2106, 2223, 2994, 3078, 4446, 4491, 6487, 6669, 8982, 9481, 12974, 13338, 13473, 18962, 19461, 20007, 26946, 28443, 38922, 40014, 40419, 56886, 58383, 80838, 85329, 116766, 123253, 170658, 175149, 246506, 255987, 350298, 369759, 511974, 525447, 739518, 767961, 1050894, 1109277, 1535922, 2218554, 3327831, 6655662, 9983493, 19966986]

約数ペア:

[(1, 19966986), (2, 9983493), (3, 6655662), (6, 3327831), (9, 2218554), (13, 1535922), (18, 1109277), (19, 1050894), (26, 767961), (27, 739518), (38, 525447), (39, 511974), (54, 369759), (57, 350298), (78, 255987), (81, 246506), (114, 175149), (117, 170658), (162, 123253), (171, 116766), (234, 85329), (247, 80838), (342, 58383), (351, 56886), (494, 40419), (499, 40014), (513, 38922), (702, 28443), (741, 26946), (998, 20007), (1026, 19461), (1053, 18962), (1482, 13473), (1497, 13338), (1539, 12974), (2106, 9481), (2223, 8982), (2994, 6669), (3078, 6487), (4446, 4491)]