21217280

素因数分解:

$2^{14}\times 5^1\times 7^1\times {\mathrm{37}}^1$

素因数の和:77

約数の個数: 120

約数和(自身を含む): 59767008

約数和(自身を除く): 38549728

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 37, 40, 56, 64, 70, 74, 80, 112, 128, 140, 148, 160, 185, 224, 256, 259, 280, 296, 320, 370, 448, 512, 518, 560, 592, 640, 740, 896, 1024, 1036, 1120, 1184, 1280, 1295, 1480, 1792, 2048, 2072, 2240, 2368, 2560, 2590, 2960, 3584, 4096, 4144, 4480, 4736, 5120, 5180, 5920, 7168, 8192, 8288, 8960, 9472, 10240, 10360, 11840, 14336, 16384, 16576, 17920, 18944, 20480, 20720, 23680, 28672, 33152, 35840, 37888, 40960, 41440, 47360, 57344, 66304, 71680, 75776, 81920, 82880, 94720, 114688, 132608, 143360, 151552, 165760, 189440, 265216, 286720, 303104, 331520, 378880, 530432, 573440, 606208, 663040, 757760, 1060864, 1326080, 1515520, 2121728, 2652160, 3031040, 4243456, 5304320, 10608640, 21217280]

約数ペア:

[(1, 21217280), (2, 10608640), (4, 5304320), (5, 4243456), (7, 3031040), (8, 2652160), (10, 2121728), (14, 1515520), (16, 1326080), (20, 1060864), (28, 757760), (32, 663040), (35, 606208), (37, 573440), (40, 530432), (56, 378880), (64, 331520), (70, 303104), (74, 286720), (80, 265216), (112, 189440), (128, 165760), (140, 151552), (148, 143360), (160, 132608), (185, 114688), (224, 94720), (256, 82880), (259, 81920), (280, 75776), (296, 71680), (320, 66304), (370, 57344), (448, 47360), (512, 41440), (518, 40960), (560, 37888), (592, 35840), (640, 33152), (740, 28672), (896, 23680), (1024, 20720), (1036, 20480), (1120, 18944), (1184, 17920), (1280, 16576), (1295, 16384), (1480, 14336), (1792, 11840), (2048, 10360), (2072, 10240), (2240, 9472), (2368, 8960), (2560, 8288), (2590, 8192), (2960, 7168), (3584, 5920), (4096, 5180), (4144, 5120), (4480, 4736)]