21000672

素因数分解:

$2^5\times 3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{947}}^1$

素因数の和:981

約数の個数: 144

約数和(自身を含む): 74535552

約数和(自身を除く): 53534880

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 14, 16, 18, 21, 22, 24, 28, 32, 33, 36, 42, 44, 48, 56, 63, 66, 72, 77, 84, 88, 96, 99, 112, 126, 132, 144, 154, 168, 176, 198, 224, 231, 252, 264, 288, 308, 336, 352, 396, 462, 504, 528, 616, 672, 693, 792, 924, 947, 1008, 1056, 1232, 1386, 1584, 1848, 1894, 2016, 2464, 2772, 2841, 3168, 3696, 3788, 5544, 5682, 6629, 7392, 7576, 8523, 10417, 11088, 11364, 13258, 15152, 17046, 19887, 20834, 22176, 22728, 26516, 30304, 31251, 34092, 39774, 41668, 45456, 53032, 59661, 62502, 68184, 72919, 79548, 83336, 90912, 93753, 106064, 119322, 125004, 136368, 145838, 159096, 166672, 187506, 212128, 218757, 238644, 250008, 272736, 291676, 318192, 333344, 375012, 437514, 477288, 500016, 583352, 636384, 656271, 750024, 875028, 954576, 1000032, 1166704, 1312542, 1500048, 1750056, 1909152, 2333408, 2625084, 3000096, 3500112, 5250168, 7000224, 10500336, 21000672]

約数ペア:

[(1, 21000672), (2, 10500336), (3, 7000224), (4, 5250168), (6, 3500112), (7, 3000096), (8, 2625084), (9, 2333408), (11, 1909152), (12, 1750056), (14, 1500048), (16, 1312542), (18, 1166704), (21, 1000032), (22, 954576), (24, 875028), (28, 750024), (32, 656271), (33, 636384), (36, 583352), (42, 500016), (44, 477288), (48, 437514), (56, 375012), (63, 333344), (66, 318192), (72, 291676), (77, 272736), (84, 250008), (88, 238644), (96, 218757), (99, 212128), (112, 187506), (126, 166672), (132, 159096), (144, 145838), (154, 136368), (168, 125004), (176, 119322), (198, 106064), (224, 93753), (231, 90912), (252, 83336), (264, 79548), (288, 72919), (308, 68184), (336, 62502), (352, 59661), (396, 53032), (462, 45456), (504, 41668), (528, 39774), (616, 34092), (672, 31251), (693, 30304), (792, 26516), (924, 22728), (947, 22176), (1008, 20834), (1056, 19887), (1232, 17046), (1386, 15152), (1584, 13258), (1848, 11364), (1894, 11088), (2016, 10417), (2464, 8523), (2772, 7576), (2841, 7392), (3168, 6629), (3696, 5682), (3788, 5544)]