21306844

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{733}}^1$

素因数の和:806

約数の個数: 36

約数和(自身を含む): 41371176

約数和(自身を除く): 20064332

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 169, 172, 338, 559, 676, 733, 1118, 1466, 2236, 2932, 7267, 9529, 14534, 19058, 29068, 31519, 38116, 63038, 123877, 126076, 247754, 409747, 495508, 819494, 1638988, 5326711, 10653422, 21306844]

約数ペア:

[(1, 21306844), (2, 10653422), (4, 5326711), (13, 1638988), (26, 819494), (43, 495508), (52, 409747), (86, 247754), (169, 126076), (172, 123877), (338, 63038), (559, 38116), (676, 31519), (733, 29068), (1118, 19058), (1466, 14534), (2236, 9529), (2932, 7267)]