21087836

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{9781}}^1$

素因数の和:9810

約数の個数: 36

約数和(自身を含む): 46836216

約数和(自身を除く): 25748380

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 77, 98, 154, 196, 308, 539, 1078, 2156, 9781, 19562, 39124, 68467, 107591, 136934, 215182, 273868, 430364, 479269, 753137, 958538, 1506274, 1917076, 3012548, 5271959, 10543918, 21087836]

約数ペア:

[(1, 21087836), (2, 10543918), (4, 5271959), (7, 3012548), (11, 1917076), (14, 1506274), (22, 958538), (28, 753137), (44, 479269), (49, 430364), (77, 273868), (98, 215182), (154, 136934), (196, 107591), (308, 68467), (539, 39124), (1078, 19562), (2156, 9781)]