21387171

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{211}}^1$

素因数の和:363

約数の個数: 32

約数和(自身を含む): 32481792

約数和(自身を除く): 11094621

約数列:

[1, 3, 13, 23, 39, 69, 113, 211, 299, 339, 633, 897, 1469, 2599, 2743, 4407, 4853, 7797, 8229, 14559, 23843, 33787, 63089, 71529, 101361, 189267, 309959, 548389, 929877, 1645167, 7129057, 21387171]

約数ペア:

[(1, 21387171), (3, 7129057), (13, 1645167), (23, 929877), (39, 548389), (69, 309959), (113, 189267), (211, 101361), (299, 71529), (339, 63089), (633, 33787), (897, 23843), (1469, 14559), (2599, 8229), (2743, 7797), (4407, 4853)]