21979984

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{105673}}^1$

素因数の和:105694

約数の個数: 20

約数和(自身を含む): 45862516

約数和(自身を除く): 23882532

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 105673, 211346, 422692, 845384, 1373749, 1690768, 2747498, 5494996, 10989992, 21979984]

約数ペア:

[(1, 21979984), (2, 10989992), (4, 5494996), (8, 2747498), (13, 1690768), (16, 1373749), (26, 845384), (52, 422692), (104, 211346), (208, 105673)]