19983964

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1$

素因数の和:96

約数の個数: 144

約数和(自身を含む): 51480576

約数和(自身を除く): 31496612

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 23, 26, 28, 31, 44, 46, 49, 52, 62, 77, 91, 92, 98, 124, 143, 154, 161, 182, 196, 217, 253, 286, 299, 308, 322, 341, 364, 403, 434, 506, 539, 572, 598, 637, 644, 682, 713, 806, 868, 1001, 1012, 1078, 1127, 1196, 1274, 1364, 1426, 1519, 1612, 1771, 2002, 2093, 2156, 2254, 2387, 2548, 2821, 2852, 3038, 3289, 3542, 4004, 4186, 4433, 4508, 4774, 4991, 5642, 6076, 6578, 7007, 7084, 7843, 8372, 8866, 9269, 9548, 9982, 11284, 12397, 13156, 14014, 14651, 15686, 16709, 17732, 18538, 19747, 19964, 23023, 24794, 28028, 29302, 31031, 31372, 33418, 34937, 37076, 39494, 46046, 49588, 54901, 58604, 62062, 64883, 66836, 69874, 78988, 92092, 101959, 109802, 124124, 129766, 139748, 161161, 203918, 217217, 219604, 259532, 322322, 384307, 407836, 434434, 454181, 644644, 713713, 768614, 868868, 908362, 1427426, 1537228, 1816724, 2854852, 4995991, 9991982, 19983964]

約数ペア:

[(1, 19983964), (2, 9991982), (4, 4995991), (7, 2854852), (11, 1816724), (13, 1537228), (14, 1427426), (22, 908362), (23, 868868), (26, 768614), (28, 713713), (31, 644644), (44, 454181), (46, 434434), (49, 407836), (52, 384307), (62, 322322), (77, 259532), (91, 219604), (92, 217217), (98, 203918), (124, 161161), (143, 139748), (154, 129766), (161, 124124), (182, 109802), (196, 101959), (217, 92092), (253, 78988), (286, 69874), (299, 66836), (308, 64883), (322, 62062), (341, 58604), (364, 54901), (403, 49588), (434, 46046), (506, 39494), (539, 37076), (572, 34937), (598, 33418), (637, 31372), (644, 31031), (682, 29302), (713, 28028), (806, 24794), (868, 23023), (1001, 19964), (1012, 19747), (1078, 18538), (1127, 17732), (1196, 16709), (1274, 15686), (1364, 14651), (1426, 14014), (1519, 13156), (1612, 12397), (1771, 11284), (2002, 9982), (2093, 9548), (2156, 9269), (2254, 8866), (2387, 8372), (2548, 7843), (2821, 7084), (2852, 7007), (3038, 6578), (3289, 6076), (3542, 5642), (4004, 4991), (4186, 4774), (4433, 4508)]