28218723

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{163}}^1\times {\mathrm{193}}^1$

素因数の和:395

約数の個数: 32

約数和(自身を含む): 42760704

約数和(自身を除く): 14541981

約数列:

[1, 3, 13, 23, 39, 69, 163, 193, 299, 489, 579, 897, 2119, 2509, 3749, 4439, 6357, 7527, 11247, 13317, 31459, 48737, 57707, 94377, 146211, 173121, 408967, 723557, 1226901, 2170671, 9406241, 28218723]

約数ペア:

[(1, 28218723), (3, 9406241), (13, 2170671), (23, 1226901), (39, 723557), (69, 408967), (163, 173121), (193, 146211), (299, 94377), (489, 57707), (579, 48737), (897, 31459), (2119, 13317), (2509, 11247), (3749, 7527), (4439, 6357)]