31387893

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 45619200

約数和(自身を除く): 14231307

約数列:

[1, 3, 23, 43, 69, 71, 129, 149, 213, 447, 989, 1633, 2967, 3053, 3427, 4899, 6407, 9159, 10281, 10579, 19221, 31737, 70219, 147361, 210657, 243317, 442083, 454897, 729951, 1364691, 10462631, 31387893]

約数ペア:

[(1, 31387893), (3, 10462631), (23, 1364691), (43, 729951), (69, 454897), (71, 442083), (129, 243317), (149, 210657), (213, 147361), (447, 70219), (989, 31737), (1633, 19221), (2967, 10579), (3053, 10281), (3427, 9159), (4899, 6407)]