21136640

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{337}}^1$

素因数の和:372

約数の個数: 108

約数和(自身を含む): 59069556

約数和(自身を除く): 37932916

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 128, 140, 160, 196, 224, 245, 256, 280, 320, 337, 392, 448, 490, 560, 640, 674, 784, 896, 980, 1120, 1280, 1348, 1568, 1685, 1792, 1960, 2240, 2359, 2696, 3136, 3370, 3920, 4480, 4718, 5392, 6272, 6740, 7840, 8960, 9436, 10784, 11795, 12544, 13480, 15680, 16513, 18872, 21568, 23590, 26960, 31360, 33026, 37744, 43136, 47180, 53920, 62720, 66052, 75488, 82565, 86272, 94360, 107840, 132104, 150976, 165130, 188720, 215680, 264208, 301952, 330260, 377440, 431360, 528416, 603904, 660520, 754880, 1056832, 1321040, 1509760, 2113664, 2642080, 3019520, 4227328, 5284160, 10568320, 21136640]

約数ペア:

[(1, 21136640), (2, 10568320), (4, 5284160), (5, 4227328), (7, 3019520), (8, 2642080), (10, 2113664), (14, 1509760), (16, 1321040), (20, 1056832), (28, 754880), (32, 660520), (35, 603904), (40, 528416), (49, 431360), (56, 377440), (64, 330260), (70, 301952), (80, 264208), (98, 215680), (112, 188720), (128, 165130), (140, 150976), (160, 132104), (196, 107840), (224, 94360), (245, 86272), (256, 82565), (280, 75488), (320, 66052), (337, 62720), (392, 53920), (448, 47180), (490, 43136), (560, 37744), (640, 33026), (674, 31360), (784, 26960), (896, 23590), (980, 21568), (1120, 18872), (1280, 16513), (1348, 15680), (1568, 13480), (1685, 12544), (1792, 11795), (1960, 10784), (2240, 9436), (2359, 8960), (2696, 7840), (3136, 6740), (3370, 6272), (3920, 5392), (4480, 4718)]