21713979

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{54421}}^1$

素因数の和:54450

約数の個数: 16

約数和(自身を含む): 34830080

約数和(自身を除く): 13116101

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 54421, 163263, 380947, 1033999, 1142841, 3101997, 7237993, 21713979]

約数ペア:

[(1, 21713979), (3, 7237993), (7, 3101997), (19, 1142841), (21, 1033999), (57, 380947), (133, 163263), (399, 54421)]