81621760

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:91

約数の個数: 216

約数和(自身を含む): 234880128

約数和(自身を除く): 153258368

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 31, 32, 34, 40, 44, 55, 62, 64, 68, 80, 85, 88, 110, 121, 124, 128, 136, 155, 160, 170, 176, 187, 220, 242, 248, 256, 272, 310, 320, 340, 341, 352, 374, 440, 484, 496, 527, 544, 605, 620, 640, 680, 682, 704, 748, 880, 935, 968, 992, 1054, 1088, 1210, 1240, 1280, 1360, 1364, 1408, 1496, 1705, 1760, 1870, 1936, 1984, 2057, 2108, 2176, 2420, 2480, 2635, 2720, 2728, 2816, 2992, 3410, 3520, 3740, 3751, 3872, 3968, 4114, 4216, 4352, 4840, 4960, 5270, 5440, 5456, 5797, 5984, 6820, 7040, 7480, 7502, 7744, 7936, 8228, 8432, 9680, 9920, 10285, 10540, 10880, 10912, 11594, 11968, 13640, 14080, 14960, 15004, 15488, 16456, 16864, 18755, 19360, 19840, 20570, 21080, 21760, 21824, 23188, 23936, 27280, 28985, 29920, 30008, 30976, 32912, 33728, 37510, 38720, 39680, 41140, 42160, 43648, 46376, 47872, 54560, 57970, 59840, 60016, 63767, 65824, 67456, 75020, 77440, 82280, 84320, 87296, 92752, 109120, 115940, 119680, 120032, 127534, 131648, 134912, 150040, 154880, 164560, 168640, 185504, 218240, 231880, 239360, 240064, 255068, 263296, 300080, 318835, 329120, 337280, 371008, 436480, 463760, 480128, 510136, 526592, 600160, 637670, 658240, 674560, 742016, 927520, 960256, 1020272, 1200320, 1275340, 1316480, 1484032, 1855040, 2040544, 2400640, 2550680, 2632960, 3710080, 4081088, 4801280, 5101360, 7420160, 8162176, 10202720, 16324352, 20405440, 40810880, 81621760]

約数ペア:

[(1, 81621760), (2, 40810880), (4, 20405440), (5, 16324352), (8, 10202720), (10, 8162176), (11, 7420160), (16, 5101360), (17, 4801280), (20, 4081088), (22, 3710080), (31, 2632960), (32, 2550680), (34, 2400640), (40, 2040544), (44, 1855040), (55, 1484032), (62, 1316480), (64, 1275340), (68, 1200320), (80, 1020272), (85, 960256), (88, 927520), (110, 742016), (121, 674560), (124, 658240), (128, 637670), (136, 600160), (155, 526592), (160, 510136), (170, 480128), (176, 463760), (187, 436480), (220, 371008), (242, 337280), (248, 329120), (256, 318835), (272, 300080), (310, 263296), (320, 255068), (340, 240064), (341, 239360), (352, 231880), (374, 218240), (440, 185504), (484, 168640), (496, 164560), (527, 154880), (544, 150040), (605, 134912), (620, 131648), (640, 127534), (680, 120032), (682, 119680), (704, 115940), (748, 109120), (880, 92752), (935, 87296), (968, 84320), (992, 82280), (1054, 77440), (1088, 75020), (1210, 67456), (1240, 65824), (1280, 63767), (1360, 60016), (1364, 59840), (1408, 57970), (1496, 54560), (1705, 47872), (1760, 46376), (1870, 43648), (1936, 42160), (1984, 41140), (2057, 39680), (2108, 38720), (2176, 37510), (2420, 33728), (2480, 32912), (2635, 30976), (2720, 30008), (2728, 29920), (2816, 28985), (2992, 27280), (3410, 23936), (3520, 23188), (3740, 21824), (3751, 21760), (3872, 21080), (3968, 20570), (4114, 19840), (4216, 19360), (4352, 18755), (4840, 16864), (4960, 16456), (5270, 15488), (5440, 15004), (5456, 14960), (5797, 14080), (5984, 13640), (6820, 11968), (7040, 11594), (7480, 10912), (7502, 10880), (7744, 10540), (7936, 10285), (8228, 9920), (8432, 9680)]