21253904

素因数分解:

$2^4\times 7^1\times {\mathrm{189767}}^1$

素因数の和:189782

約数の個数: 20

約数和(自身を含む): 47062464

約数和(自身を除く): 25808560

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 189767, 379534, 759068, 1328369, 1518136, 2656738, 3036272, 5313476, 10626952, 21253904]

約数ペア:

[(1, 21253904), (2, 10626952), (4, 5313476), (7, 3036272), (8, 2656738), (14, 1518136), (16, 1328369), (28, 759068), (56, 379534), (112, 189767)]