21238756

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{9851}}^1$

素因数の和:9880

約数の個数: 36

約数和(自身を含む): 47171376

約数和(自身を除く): 25932620

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 77, 98, 154, 196, 308, 539, 1078, 2156, 9851, 19702, 39404, 68957, 108361, 137914, 216722, 275828, 433444, 482699, 758527, 965398, 1517054, 1930796, 3034108, 5309689, 10619378, 21238756]

約数ペア:

[(1, 21238756), (2, 10619378), (4, 5309689), (7, 3034108), (11, 1930796), (14, 1517054), (22, 965398), (28, 758527), (44, 482699), (49, 433444), (77, 275828), (98, 216722), (154, 137914), (196, 108361), (308, 68957), (539, 39404), (1078, 19702), (2156, 9851)]