81217840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:191

約数の個数: 160

約数和(自身を含む): 224182080

約数和(自身を除く): 142964240

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 34, 40, 44, 55, 61, 68, 80, 85, 88, 89, 110, 122, 136, 170, 176, 178, 187, 220, 244, 272, 305, 340, 356, 374, 440, 445, 488, 610, 671, 680, 712, 748, 880, 890, 935, 976, 979, 1037, 1220, 1342, 1360, 1424, 1496, 1513, 1780, 1870, 1958, 2074, 2440, 2684, 2992, 3026, 3355, 3560, 3740, 3916, 4148, 4880, 4895, 5185, 5368, 5429, 6052, 6710, 7120, 7480, 7565, 7832, 8296, 9790, 10370, 10736, 10858, 11407, 12104, 13420, 14960, 15130, 15664, 16592, 16643, 19580, 20740, 21716, 22814, 24208, 26840, 27145, 30260, 33286, 39160, 41480, 43432, 45628, 53680, 54290, 57035, 59719, 60520, 66572, 78320, 82960, 83215, 86864, 91256, 92293, 108580, 114070, 119438, 121040, 133144, 166430, 182512, 184586, 217160, 228140, 238876, 266288, 298595, 332860, 369172, 434320, 456280, 461465, 477752, 597190, 665720, 738344, 912560, 922930, 955504, 1015223, 1194380, 1331440, 1476688, 1845860, 2030446, 2388760, 3691720, 4060892, 4777520, 5076115, 7383440, 8121784, 10152230, 16243568, 20304460, 40608920, 81217840]

約数ペア:

[(1, 81217840), (2, 40608920), (4, 20304460), (5, 16243568), (8, 10152230), (10, 8121784), (11, 7383440), (16, 5076115), (17, 4777520), (20, 4060892), (22, 3691720), (34, 2388760), (40, 2030446), (44, 1845860), (55, 1476688), (61, 1331440), (68, 1194380), (80, 1015223), (85, 955504), (88, 922930), (89, 912560), (110, 738344), (122, 665720), (136, 597190), (170, 477752), (176, 461465), (178, 456280), (187, 434320), (220, 369172), (244, 332860), (272, 298595), (305, 266288), (340, 238876), (356, 228140), (374, 217160), (440, 184586), (445, 182512), (488, 166430), (610, 133144), (671, 121040), (680, 119438), (712, 114070), (748, 108580), (880, 92293), (890, 91256), (935, 86864), (976, 83215), (979, 82960), (1037, 78320), (1220, 66572), (1342, 60520), (1360, 59719), (1424, 57035), (1496, 54290), (1513, 53680), (1780, 45628), (1870, 43432), (1958, 41480), (2074, 39160), (2440, 33286), (2684, 30260), (2992, 27145), (3026, 26840), (3355, 24208), (3560, 22814), (3740, 21716), (3916, 20740), (4148, 19580), (4880, 16643), (4895, 16592), (5185, 15664), (5368, 15130), (5429, 14960), (6052, 13420), (6710, 12104), (7120, 11407), (7480, 10858), (7565, 10736), (7832, 10370), (8296, 9790)]