20458557

素因数分解:

$3^2\times 7^1\times {\mathrm{127}}^1\times {\mathrm{2557}}^1$

素因数の和:2697

約数の個数: 24

約数和(自身を含む): 34052096

約数和(自身を除く): 13593539

約数列:

[1, 3, 7, 9, 21, 63, 127, 381, 889, 1143, 2557, 2667, 7671, 8001, 17899, 23013, 53697, 161091, 324739, 974217, 2273173, 2922651, 6819519, 20458557]

約数ペア:

[(1, 20458557), (3, 6819519), (7, 2922651), (9, 2273173), (21, 974217), (63, 324739), (127, 161091), (381, 53697), (889, 23013), (1143, 17899), (2557, 8001), (2667, 7671)]