20548640

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2621}}^1$

素因数の和:2650

約数の個数: 72

約数和(自身を含む): 56493612

約数和(自身を除く): 35944972

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2621, 3920, 5242, 7840, 10484, 13105, 18347, 20968, 26210, 36694, 41936, 52420, 73388, 83872, 91735, 104840, 128429, 146776, 183470, 209680, 256858, 293552, 366940, 419360, 513716, 587104, 642145, 733880, 1027432, 1284290, 1467760, 2054864, 2568580, 2935520, 4109728, 5137160, 10274320, 20548640]

約数ペア:

[(1, 20548640), (2, 10274320), (4, 5137160), (5, 4109728), (7, 2935520), (8, 2568580), (10, 2054864), (14, 1467760), (16, 1284290), (20, 1027432), (28, 733880), (32, 642145), (35, 587104), (40, 513716), (49, 419360), (56, 366940), (70, 293552), (80, 256858), (98, 209680), (112, 183470), (140, 146776), (160, 128429), (196, 104840), (224, 91735), (245, 83872), (280, 73388), (392, 52420), (490, 41936), (560, 36694), (784, 26210), (980, 20968), (1120, 18347), (1568, 13105), (1960, 10484), (2621, 7840), (3920, 5242)]