128385207

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{491}}^1\times {\mathrm{1709}}^1$

素因数の和:2223

約数の個数: 24

約数和(自身を含む): 196868880

約数和(自身を除く): 68483673

約数列:

[1, 3, 9, 17, 51, 153, 491, 1473, 1709, 4419, 5127, 8347, 15381, 25041, 29053, 75123, 87159, 261477, 839119, 2517357, 7552071, 14265023, 42795069, 128385207]

約数ペア:

[(1, 128385207), (3, 42795069), (9, 14265023), (17, 7552071), (51, 2517357), (153, 839119), (491, 261477), (1473, 87159), (1709, 75123), (4419, 29053), (5127, 25041), (8347, 15381)]