21381256

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{205589}}^1$

素因数の和:205608

約数の個数: 16

約数和(自身を含む): 43173900

約数和(自身を除く): 21792644

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 205589, 411178, 822356, 1644712, 2672657, 5345314, 10690628, 21381256]

約数ペア:

[(1, 21381256), (2, 10690628), (4, 5345314), (8, 2672657), (13, 1644712), (26, 822356), (52, 411178), (104, 205589)]