20987956

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{11093}}^1$

素因数の和:11151

約数の個数: 24

約数和(自身を含む): 41003424

約数和(自身を除く): 20015468

約数列:

[1, 2, 4, 11, 22, 43, 44, 86, 172, 473, 946, 1892, 11093, 22186, 44372, 122023, 244046, 476999, 488092, 953998, 1907996, 5246989, 10493978, 20987956]

約数ペア:

[(1, 20987956), (2, 10493978), (4, 5246989), (11, 1907996), (22, 953998), (43, 488092), (44, 476999), (86, 244046), (172, 122023), (473, 44372), (946, 22186), (1892, 11093)]