21690039

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{54361}}^1$

素因数の和:54390

約数の個数: 16

約数和(自身を含む): 34791680

約数和(自身を除く): 13101641

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 54361, 163083, 380527, 1032859, 1141581, 3098577, 7230013, 21690039]

約数ペア:

[(1, 21690039), (3, 7230013), (7, 3098577), (19, 1141581), (21, 1032859), (57, 380527), (133, 163083), (399, 54361)]