20405240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{26849}}^1$

素因数の和:26879

約数の個数: 32

約数和(自身を含む): 48330000

約数和(自身を除く): 27924760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 26849, 53698, 107396, 134245, 214792, 268490, 510131, 536980, 1020262, 1073960, 2040524, 2550655, 4081048, 5101310, 10202620, 20405240]

約数ペア:

[(1, 20405240), (2, 10202620), (4, 5101310), (5, 4081048), (8, 2550655), (10, 2040524), (19, 1073960), (20, 1020262), (38, 536980), (40, 510131), (76, 268490), (95, 214792), (152, 134245), (190, 107396), (380, 53698), (760, 26849)]