20936720

素因数分解:

$2^4\times 5^1\times 7^4\times {\mathrm{109}}^1$

素因数の和:150

約数の個数: 100

約数和(自身を含む): 57308460

約数和(自身を除く): 36371740

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 109, 112, 140, 196, 218, 245, 280, 343, 392, 436, 490, 545, 560, 686, 763, 784, 872, 980, 1090, 1372, 1526, 1715, 1744, 1960, 2180, 2401, 2744, 3052, 3430, 3815, 3920, 4360, 4802, 5341, 5488, 6104, 6860, 7630, 8720, 9604, 10682, 12005, 12208, 13720, 15260, 19208, 21364, 24010, 26705, 27440, 30520, 37387, 38416, 42728, 48020, 53410, 61040, 74774, 85456, 96040, 106820, 149548, 186935, 192080, 213640, 261709, 299096, 373870, 427280, 523418, 598192, 747740, 1046836, 1308545, 1495480, 2093672, 2617090, 2990960, 4187344, 5234180, 10468360, 20936720]

約数ペア:

[(1, 20936720), (2, 10468360), (4, 5234180), (5, 4187344), (7, 2990960), (8, 2617090), (10, 2093672), (14, 1495480), (16, 1308545), (20, 1046836), (28, 747740), (35, 598192), (40, 523418), (49, 427280), (56, 373870), (70, 299096), (80, 261709), (98, 213640), (109, 192080), (112, 186935), (140, 149548), (196, 106820), (218, 96040), (245, 85456), (280, 74774), (343, 61040), (392, 53410), (436, 48020), (490, 42728), (545, 38416), (560, 37387), (686, 30520), (763, 27440), (784, 26705), (872, 24010), (980, 21364), (1090, 19208), (1372, 15260), (1526, 13720), (1715, 12208), (1744, 12005), (1960, 10682), (2180, 9604), (2401, 8720), (2744, 7630), (3052, 6860), (3430, 6104), (3815, 5488), (3920, 5341), (4360, 4802)]