20895840

素因数分解:

$2^5\times 3^3\times 5^1\times 7^1\times {\mathrm{691}}^1$

素因数の和:722

約数の個数: 192

約数和(自身を含む): 83704320

約数和(自身を除く): 62808480

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 70, 72, 80, 84, 90, 96, 105, 108, 112, 120, 126, 135, 140, 144, 160, 168, 180, 189, 210, 216, 224, 240, 252, 270, 280, 288, 315, 336, 360, 378, 420, 432, 480, 504, 540, 560, 630, 672, 691, 720, 756, 840, 864, 945, 1008, 1080, 1120, 1260, 1382, 1440, 1512, 1680, 1890, 2016, 2073, 2160, 2520, 2764, 3024, 3360, 3455, 3780, 4146, 4320, 4837, 5040, 5528, 6048, 6219, 6910, 7560, 8292, 9674, 10080, 10365, 11056, 12438, 13820, 14511, 15120, 16584, 18657, 19348, 20730, 22112, 24185, 24876, 27640, 29022, 30240, 31095, 33168, 37314, 38696, 41460, 43533, 48370, 49752, 55280, 58044, 62190, 66336, 72555, 74628, 77392, 82920, 87066, 93285, 96740, 99504, 110560, 116088, 124380, 130599, 145110, 149256, 154784, 165840, 174132, 186570, 193480, 199008, 217665, 232176, 248760, 261198, 290220, 298512, 331680, 348264, 373140, 386960, 435330, 464352, 497520, 522396, 580440, 597024, 652995, 696528, 746280, 773920, 870660, 995040, 1044792, 1160880, 1305990, 1393056, 1492560, 1741320, 2089584, 2321760, 2611980, 2985120, 3482640, 4179168, 5223960, 6965280, 10447920, 20895840]

約数ペア:

[(1, 20895840), (2, 10447920), (3, 6965280), (4, 5223960), (5, 4179168), (6, 3482640), (7, 2985120), (8, 2611980), (9, 2321760), (10, 2089584), (12, 1741320), (14, 1492560), (15, 1393056), (16, 1305990), (18, 1160880), (20, 1044792), (21, 995040), (24, 870660), (27, 773920), (28, 746280), (30, 696528), (32, 652995), (35, 597024), (36, 580440), (40, 522396), (42, 497520), (45, 464352), (48, 435330), (54, 386960), (56, 373140), (60, 348264), (63, 331680), (70, 298512), (72, 290220), (80, 261198), (84, 248760), (90, 232176), (96, 217665), (105, 199008), (108, 193480), (112, 186570), (120, 174132), (126, 165840), (135, 154784), (140, 149256), (144, 145110), (160, 130599), (168, 124380), (180, 116088), (189, 110560), (210, 99504), (216, 96740), (224, 93285), (240, 87066), (252, 82920), (270, 77392), (280, 74628), (288, 72555), (315, 66336), (336, 62190), (360, 58044), (378, 55280), (420, 49752), (432, 48370), (480, 43533), (504, 41460), (540, 38696), (560, 37314), (630, 33168), (672, 31095), (691, 30240), (720, 29022), (756, 27640), (840, 24876), (864, 24185), (945, 22112), (1008, 20730), (1080, 19348), (1120, 18657), (1260, 16584), (1382, 15120), (1440, 14511), (1512, 13820), (1680, 12438), (1890, 11056), (2016, 10365), (2073, 10080), (2160, 9674), (2520, 8292), (2764, 7560), (3024, 6910), (3360, 6219), (3455, 6048), (3780, 5528), (4146, 5040), (4320, 4837)]