21286936

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{3407}}^1$

素因数の和:3495

約数の個数: 32

約数和(自身を含む): 44167680

約数和(自身を除く): 22880744

約数列:

[1, 2, 4, 8, 11, 22, 44, 71, 88, 142, 284, 568, 781, 1562, 3124, 3407, 6248, 6814, 13628, 27256, 37477, 74954, 149908, 241897, 299816, 483794, 967588, 1935176, 2660867, 5321734, 10643468, 21286936]

約数ペア:

[(1, 21286936), (2, 10643468), (4, 5321734), (8, 2660867), (11, 1935176), (22, 967588), (44, 483794), (71, 299816), (88, 241897), (142, 149908), (284, 74954), (568, 37477), (781, 27256), (1562, 13628), (3124, 6814), (3407, 6248)]