20842563

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{52237}}^1$

素因数の和:52266

約数の個数: 16

約数和(自身を含む): 33432320

約数和(自身を除く): 12589757

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 52237, 156711, 365659, 992503, 1096977, 2977509, 6947521, 20842563]

約数ペア:

[(1, 20842563), (3, 6947521), (7, 2977509), (19, 1096977), (21, 992503), (57, 365659), (133, 156711), (399, 52237)]