21221992

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{349}}^1\times {\mathrm{691}}^1$

素因数の和:1057

約数の個数: 32

約数和(自身を含む): 43596000

約数和(自身を除く): 22374008

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 349, 691, 698, 1382, 1396, 2764, 2792, 3839, 5528, 7601, 7678, 15202, 15356, 30404, 30712, 60808, 241159, 482318, 964636, 1929272, 2652749, 5305498, 10610996, 21221992]

約数ペア:

[(1, 21221992), (2, 10610996), (4, 5305498), (8, 2652749), (11, 1929272), (22, 964636), (44, 482318), (88, 241159), (349, 60808), (691, 30712), (698, 30404), (1382, 15356), (1396, 15202), (2764, 7678), (2792, 7601), (3839, 5528)]