21472240

素因数分解:

$2^4\times 5^1\times {\mathrm{268403}}^1$

素因数の和:268416

約数の個数: 20

約数和(自身を含む): 49923144

約数和(自身を除く): 28450904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268403, 536806, 1073612, 1342015, 2147224, 2684030, 4294448, 5368060, 10736120, 21472240]

約数ペア:

[(1, 21472240), (2, 10736120), (4, 5368060), (5, 4294448), (8, 2684030), (10, 2147224), (16, 1342015), (20, 1073612), (40, 536806), (80, 268403)]