20736828

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:168

約数の個数: 144

約数和(自身を含む): 64995840

約数和(自身を除く): 44259012

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 19, 21, 28, 36, 38, 42, 57, 61, 63, 71, 76, 84, 114, 122, 126, 133, 142, 171, 183, 213, 228, 244, 252, 266, 284, 342, 366, 399, 426, 427, 497, 532, 549, 639, 684, 732, 798, 852, 854, 994, 1098, 1159, 1197, 1278, 1281, 1349, 1491, 1596, 1708, 1988, 2196, 2318, 2394, 2556, 2562, 2698, 2982, 3477, 3843, 4047, 4331, 4473, 4636, 4788, 5124, 5396, 5964, 6954, 7686, 8094, 8113, 8662, 8946, 9443, 10431, 12141, 12993, 13908, 15372, 16188, 16226, 17324, 17892, 18886, 20862, 24282, 24339, 25986, 28329, 30317, 32452, 37772, 38979, 41724, 48564, 48678, 51972, 56658, 60634, 73017, 77958, 82289, 84987, 90951, 97356, 113316, 121268, 146034, 155916, 164578, 169974, 181902, 246867, 272853, 292068, 329156, 339948, 363804, 493734, 545706, 576023, 740601, 987468, 1091412, 1152046, 1481202, 1728069, 2304092, 2962404, 3456138, 5184207, 6912276, 10368414, 20736828]

約数ペア:

[(1, 20736828), (2, 10368414), (3, 6912276), (4, 5184207), (6, 3456138), (7, 2962404), (9, 2304092), (12, 1728069), (14, 1481202), (18, 1152046), (19, 1091412), (21, 987468), (28, 740601), (36, 576023), (38, 545706), (42, 493734), (57, 363804), (61, 339948), (63, 329156), (71, 292068), (76, 272853), (84, 246867), (114, 181902), (122, 169974), (126, 164578), (133, 155916), (142, 146034), (171, 121268), (183, 113316), (213, 97356), (228, 90951), (244, 84987), (252, 82289), (266, 77958), (284, 73017), (342, 60634), (366, 56658), (399, 51972), (426, 48678), (427, 48564), (497, 41724), (532, 38979), (549, 37772), (639, 32452), (684, 30317), (732, 28329), (798, 25986), (852, 24339), (854, 24282), (994, 20862), (1098, 18886), (1159, 17892), (1197, 17324), (1278, 16226), (1281, 16188), (1349, 15372), (1491, 13908), (1596, 12993), (1708, 12141), (1988, 10431), (2196, 9443), (2318, 8946), (2394, 8662), (2556, 8113), (2562, 8094), (2698, 7686), (2982, 6954), (3477, 5964), (3843, 5396), (4047, 5124), (4331, 4788), (4473, 4636)]