21651716

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{431}}^1\times {\mathrm{661}}^1$

素因数の和:1115

約数の個数: 24

約数和(自身を含む): 40037760

約数和(自身を除く): 18386044

約数列:

[1, 2, 4, 19, 38, 76, 431, 661, 862, 1322, 1724, 2644, 8189, 12559, 16378, 25118, 32756, 50236, 284891, 569782, 1139564, 5412929, 10825858, 21651716]

約数ペア:

[(1, 21651716), (2, 10825858), (4, 5412929), (19, 1139564), (38, 569782), (76, 284891), (431, 50236), (661, 32756), (862, 25118), (1322, 16378), (1724, 12559), (2644, 8189)]