21653528

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{208207}}^1$

素因数の和:208226

約数の個数: 16

約数和(自身を含む): 43723680

約数和(自身を除く): 22070152

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 208207, 416414, 832828, 1665656, 2706691, 5413382, 10826764, 21653528]

約数ペア:

[(1, 21653528), (2, 10826764), (4, 5413382), (8, 2706691), (13, 1665656), (26, 832828), (52, 416414), (104, 208207)]