21125896

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{431}}^1\times {\mathrm{557}}^1$

素因数の和:1005

約数の個数: 32

約数和(自身を含む): 43390080

約数和(自身を除く): 22264184

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 431, 557, 862, 1114, 1724, 2228, 3448, 4456, 4741, 6127, 9482, 12254, 18964, 24508, 37928, 49016, 240067, 480134, 960268, 1920536, 2640737, 5281474, 10562948, 21125896]

約数ペア:

[(1, 21125896), (2, 10562948), (4, 5281474), (8, 2640737), (11, 1920536), (22, 960268), (44, 480134), (88, 240067), (431, 49016), (557, 37928), (862, 24508), (1114, 18964), (1724, 12254), (2228, 9482), (3448, 6127), (4456, 4741)]