19986771

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{887}}^1$

素因数の和:963

約数の個数: 32

約数和(自身を含む): 32394240

約数和(自身を除く): 12407469

約数列:

[1, 3, 7, 21, 29, 37, 87, 111, 203, 259, 609, 777, 887, 1073, 2661, 3219, 6209, 7511, 18627, 22533, 25723, 32819, 77169, 98457, 180061, 229733, 540183, 689199, 951751, 2855253, 6662257, 19986771]

約数ペア:

[(1, 19986771), (3, 6662257), (7, 2855253), (21, 951751), (29, 689199), (37, 540183), (87, 229733), (111, 180061), (203, 98457), (259, 77169), (609, 32819), (777, 25723), (887, 22533), (1073, 18627), (2661, 7511), (3219, 6209)]