21508456

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{1993}}^1$

素因数の和:2089

約数の個数: 32

約数和(自身を含む): 43070400

約数和(自身を除く): 21561944

約数列:

[1, 2, 4, 8, 19, 38, 71, 76, 142, 152, 284, 568, 1349, 1993, 2698, 3986, 5396, 7972, 10792, 15944, 37867, 75734, 141503, 151468, 283006, 302936, 566012, 1132024, 2688557, 5377114, 10754228, 21508456]

約数ペア:

[(1, 21508456), (2, 10754228), (4, 5377114), (8, 2688557), (19, 1132024), (38, 566012), (71, 302936), (76, 283006), (142, 151468), (152, 141503), (284, 75734), (568, 37867), (1349, 15944), (1993, 10792), (2698, 7972), (3986, 5396)]