21189789

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{21211}}^1$

素因数の和:21257

約数の個数: 16

約数和(自身を含む): 32242240

約数和(自身を除く): 11052451

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 21211, 63633, 190899, 572697, 784807, 2354421, 7063263, 21189789]

約数ペア:

[(1, 21189789), (3, 7063263), (9, 2354421), (27, 784807), (37, 572697), (111, 190899), (333, 63633), (999, 21211)]