21263344

素因数分解:

$2^4\times {\mathrm{1031}}^1\times {\mathrm{1289}}^1$

素因数の和:2328

約数の個数: 20

約数和(自身を含む): 41269680

約数和(自身を除く): 20006336

約数列:

[1, 2, 4, 8, 16, 1031, 1289, 2062, 2578, 4124, 5156, 8248, 10312, 16496, 20624, 1328959, 2657918, 5315836, 10631672, 21263344]

約数ペア:

[(1, 21263344), (2, 10631672), (4, 5315836), (8, 2657918), (16, 1328959), (1031, 20624), (1289, 16496), (2062, 10312), (2578, 8248), (4124, 5156)]