81345680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:193

約数の個数: 160

約数和(自身を含む): 222735744

約数和(自身を除く): 141390064

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 34, 40, 43, 52, 65, 68, 80, 85, 86, 104, 107, 130, 136, 170, 172, 208, 214, 215, 221, 260, 272, 340, 344, 428, 430, 442, 520, 535, 559, 680, 688, 731, 856, 860, 884, 1040, 1070, 1105, 1118, 1360, 1391, 1462, 1712, 1720, 1768, 1819, 2140, 2210, 2236, 2782, 2795, 2924, 3440, 3536, 3638, 3655, 4280, 4420, 4472, 4601, 5564, 5590, 5848, 6955, 7276, 7310, 8560, 8840, 8944, 9095, 9202, 9503, 11128, 11180, 11696, 13910, 14552, 14620, 17680, 18190, 18404, 19006, 22256, 22360, 23005, 23647, 27820, 29104, 29240, 36380, 36808, 38012, 44720, 46010, 47294, 47515, 55640, 58480, 59813, 72760, 73616, 76024, 78217, 92020, 94588, 95030, 111280, 118235, 119626, 145520, 152048, 156434, 184040, 189176, 190060, 236470, 239252, 299065, 312868, 368080, 378352, 380120, 391085, 472940, 478504, 598130, 625736, 760240, 782170, 945880, 957008, 1016821, 1196260, 1251472, 1564340, 1891760, 2033642, 2392520, 3128680, 4067284, 4785040, 5084105, 6257360, 8134568, 10168210, 16269136, 20336420, 40672840, 81345680]

約数ペア:

[(1, 81345680), (2, 40672840), (4, 20336420), (5, 16269136), (8, 10168210), (10, 8134568), (13, 6257360), (16, 5084105), (17, 4785040), (20, 4067284), (26, 3128680), (34, 2392520), (40, 2033642), (43, 1891760), (52, 1564340), (65, 1251472), (68, 1196260), (80, 1016821), (85, 957008), (86, 945880), (104, 782170), (107, 760240), (130, 625736), (136, 598130), (170, 478504), (172, 472940), (208, 391085), (214, 380120), (215, 378352), (221, 368080), (260, 312868), (272, 299065), (340, 239252), (344, 236470), (428, 190060), (430, 189176), (442, 184040), (520, 156434), (535, 152048), (559, 145520), (680, 119626), (688, 118235), (731, 111280), (856, 95030), (860, 94588), (884, 92020), (1040, 78217), (1070, 76024), (1105, 73616), (1118, 72760), (1360, 59813), (1391, 58480), (1462, 55640), (1712, 47515), (1720, 47294), (1768, 46010), (1819, 44720), (2140, 38012), (2210, 36808), (2236, 36380), (2782, 29240), (2795, 29104), (2924, 27820), (3440, 23647), (3536, 23005), (3638, 22360), (3655, 22256), (4280, 19006), (4420, 18404), (4472, 18190), (4601, 17680), (5564, 14620), (5590, 14552), (5848, 13910), (6955, 11696), (7276, 11180), (7310, 11128), (8560, 9503), (8840, 9202), (8944, 9095)]