21664480

素因数分解:

$2^5\times 5^1\times {\mathrm{135403}}^1$

素因数の和:135418

約数の個数: 24

約数和(自身を含む): 51182712

約数和(自身を除く): 29518232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 135403, 270806, 541612, 677015, 1083224, 1354030, 2166448, 2708060, 4332896, 5416120, 10832240, 21664480]

約数ペア:

[(1, 21664480), (2, 10832240), (4, 5416120), (5, 4332896), (8, 2708060), (10, 2166448), (16, 1354030), (20, 1083224), (32, 677015), (40, 541612), (80, 270806), (160, 135403)]