21215229

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53171}}^1$

素因数の和:53200

約数の個数: 16

約数和(自身を含む): 34030080

約数和(自身を除く): 12814851

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53171, 159513, 372197, 1010249, 1116591, 3030747, 7071743, 21215229]

約数ペア:

[(1, 21215229), (3, 7071743), (7, 3030747), (19, 1116591), (21, 1010249), (57, 372197), (133, 159513), (399, 53171)]