21280456

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{733}}^1$

素因数の和:949

約数の個数: 32

約数和(自身を含む): 42278400

約数和(自身を除く): 20997944

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 191, 382, 733, 764, 1466, 1528, 2932, 3629, 5864, 7258, 13927, 14516, 27854, 29032, 55708, 111416, 140003, 280006, 560012, 1120024, 2660057, 5320114, 10640228, 21280456]

約数ペア:

[(1, 21280456), (2, 10640228), (4, 5320114), (8, 2660057), (19, 1120024), (38, 560012), (76, 280006), (152, 140003), (191, 111416), (382, 55708), (733, 29032), (764, 27854), (1466, 14516), (1528, 13927), (2932, 7258), (3629, 5864)]