81031520

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^3$

素因数の和:125

約数の個数: 96

約数和(自身を含む): 209454336

約数和(自身を除く): 128422816

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 32, 34, 40, 62, 68, 80, 85, 124, 136, 155, 160, 170, 248, 272, 310, 340, 496, 527, 544, 620, 680, 961, 992, 1054, 1240, 1360, 1922, 2108, 2480, 2635, 2720, 3844, 4216, 4805, 4960, 5270, 7688, 8432, 9610, 10540, 15376, 16337, 16864, 19220, 21080, 29791, 30752, 32674, 38440, 42160, 59582, 65348, 76880, 81685, 84320, 119164, 130696, 148955, 153760, 163370, 238328, 261392, 297910, 326740, 476656, 506447, 522784, 595820, 653480, 953312, 1012894, 1191640, 1306960, 2025788, 2383280, 2532235, 2613920, 4051576, 4766560, 5064470, 8103152, 10128940, 16206304, 20257880, 40515760, 81031520]

約数ペア:

[(1, 81031520), (2, 40515760), (4, 20257880), (5, 16206304), (8, 10128940), (10, 8103152), (16, 5064470), (17, 4766560), (20, 4051576), (31, 2613920), (32, 2532235), (34, 2383280), (40, 2025788), (62, 1306960), (68, 1191640), (80, 1012894), (85, 953312), (124, 653480), (136, 595820), (155, 522784), (160, 506447), (170, 476656), (248, 326740), (272, 297910), (310, 261392), (340, 238328), (496, 163370), (527, 153760), (544, 148955), (620, 130696), (680, 119164), (961, 84320), (992, 81685), (1054, 76880), (1240, 65348), (1360, 59582), (1922, 42160), (2108, 38440), (2480, 32674), (2635, 30752), (2720, 29791), (3844, 21080), (4216, 19220), (4805, 16864), (4960, 16337), (5270, 15376), (7688, 10540), (8432, 9610)]