81548740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{173}}^1$

素因数の和:246

約数の個数: 144

約数和(自身を含む): 221607792

約数和(自身を除く): 140059052

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 37, 49, 52, 65, 70, 74, 91, 98, 130, 140, 148, 173, 182, 185, 196, 245, 259, 260, 346, 364, 370, 455, 481, 490, 518, 637, 692, 740, 865, 910, 962, 980, 1036, 1211, 1274, 1295, 1730, 1813, 1820, 1924, 2249, 2405, 2422, 2548, 2590, 3185, 3367, 3460, 3626, 4498, 4810, 4844, 5180, 6055, 6370, 6401, 6734, 7252, 8477, 8996, 9065, 9620, 11245, 12110, 12740, 12802, 13468, 15743, 16835, 16954, 18130, 22490, 23569, 24220, 25604, 31486, 32005, 33670, 33908, 36260, 42385, 44807, 44980, 47138, 62972, 64010, 67340, 78715, 83213, 84770, 89614, 94276, 110201, 117845, 128020, 157430, 166426, 169540, 179228, 220402, 224035, 235690, 313649, 314860, 332852, 416065, 440804, 448070, 471380, 551005, 582491, 627298, 832130, 896140, 1102010, 1164982, 1254596, 1568245, 1664260, 2204020, 2329964, 2912455, 3136490, 4077437, 5824910, 6272980, 8154874, 11649820, 16309748, 20387185, 40774370, 81548740]

約数ペア:

[(1, 81548740), (2, 40774370), (4, 20387185), (5, 16309748), (7, 11649820), (10, 8154874), (13, 6272980), (14, 5824910), (20, 4077437), (26, 3136490), (28, 2912455), (35, 2329964), (37, 2204020), (49, 1664260), (52, 1568245), (65, 1254596), (70, 1164982), (74, 1102010), (91, 896140), (98, 832130), (130, 627298), (140, 582491), (148, 551005), (173, 471380), (182, 448070), (185, 440804), (196, 416065), (245, 332852), (259, 314860), (260, 313649), (346, 235690), (364, 224035), (370, 220402), (455, 179228), (481, 169540), (490, 166426), (518, 157430), (637, 128020), (692, 117845), (740, 110201), (865, 94276), (910, 89614), (962, 84770), (980, 83213), (1036, 78715), (1211, 67340), (1274, 64010), (1295, 62972), (1730, 47138), (1813, 44980), (1820, 44807), (1924, 42385), (2249, 36260), (2405, 33908), (2422, 33670), (2548, 32005), (2590, 31486), (3185, 25604), (3367, 24220), (3460, 23569), (3626, 22490), (4498, 18130), (4810, 16954), (4844, 16835), (5180, 15743), (6055, 13468), (6370, 12802), (6401, 12740), (6734, 12110), (7252, 11245), (8477, 9620), (8996, 9065)]