28142838

素因数分解:

$2^1\times 3^2\times {\mathrm{19}}^2\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:178

約数の個数: 72

約数和(自身を含む): 66330576

約数和(自身を除く): 38187738

約数列:

[1, 2, 3, 6, 9, 18, 19, 38, 57, 61, 71, 114, 122, 142, 171, 183, 213, 342, 361, 366, 426, 549, 639, 722, 1083, 1098, 1159, 1278, 1349, 2166, 2318, 2698, 3249, 3477, 4047, 4331, 6498, 6954, 8094, 8662, 10431, 12141, 12993, 20862, 22021, 24282, 25631, 25986, 38979, 44042, 51262, 66063, 76893, 77958, 82289, 132126, 153786, 164578, 198189, 230679, 246867, 396378, 461358, 493734, 740601, 1481202, 1563491, 3126982, 4690473, 9380946, 14071419, 28142838]

約数ペア:

[(1, 28142838), (2, 14071419), (3, 9380946), (6, 4690473), (9, 3126982), (18, 1563491), (19, 1481202), (38, 740601), (57, 493734), (61, 461358), (71, 396378), (114, 246867), (122, 230679), (142, 198189), (171, 164578), (183, 153786), (213, 132126), (342, 82289), (361, 77958), (366, 76893), (426, 66063), (549, 51262), (639, 44042), (722, 38979), (1083, 25986), (1098, 25631), (1159, 24282), (1278, 22021), (1349, 20862), (2166, 12993), (2318, 12141), (2698, 10431), (3249, 8662), (3477, 8094), (4047, 6954), (4331, 6498)]