21238775

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{859}}^1$

素因数の和:935

約数の個数: 24

約数和(自身を含む): 28152960

約数和(自身を除く): 6914185

約数列:

[1, 5, 23, 25, 43, 115, 215, 575, 859, 989, 1075, 4295, 4945, 19757, 21475, 24725, 36937, 98785, 184685, 493925, 849551, 923425, 4247755, 21238775]

約数ペア:

[(1, 21238775), (5, 4247755), (23, 923425), (25, 849551), (43, 493925), (115, 184685), (215, 98785), (575, 36937), (859, 24725), (989, 21475), (1075, 19757), (4295, 4945)]