21047120

素因数分解:

$2^4\times 5^1\times {\mathrm{263089}}^1$

素因数の和:263102

約数の個数: 20

約数和(自身を含む): 48934740

約数和(自身を除く): 27887620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263089, 526178, 1052356, 1315445, 2104712, 2630890, 4209424, 5261780, 10523560, 21047120]

約数ペア:

[(1, 21047120), (2, 10523560), (4, 5261780), (5, 4209424), (8, 2630890), (10, 2104712), (16, 1315445), (20, 1052356), (40, 526178), (80, 263089)]