631971

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:143

約数の個数: 24

約数和(自身を含む): 988416

約数和(自身を除く): 356445

約数列:

[1, 3, 9, 23, 43, 69, 71, 129, 207, 213, 387, 639, 989, 1633, 2967, 3053, 4899, 8901, 9159, 14697, 27477, 70219, 210657, 631971]

約数ペア:

[(1, 631971), (3, 210657), (9, 70219), (23, 27477), (43, 14697), (69, 9159), (71, 8901), (129, 4899), (207, 3053), (213, 2967), (387, 1633), (639, 989)]