21213591

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{21493}}^1$

素因数の和:21550

約数の個数: 16

約数和(自身を含む): 33014784

約数和(自身を除く): 11801193

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 21493, 64479, 150451, 451353, 1010171, 3030513, 7071197, 21213591]

約数ペア:

[(1, 21213591), (3, 7071197), (7, 3030513), (21, 1010171), (47, 451353), (141, 150451), (329, 64479), (987, 21493)]