51423560

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1987}}^1$

素因数の和:2645

約数の個数: 32

約数和(自身を含む): 115940160

約数和(自身を除く): 64516600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 1294, 1987, 2588, 3235, 3974, 5176, 6470, 7948, 9935, 12940, 15896, 19870, 25880, 39740, 79480, 1285589, 2571178, 5142356, 6427945, 10284712, 12855890, 25711780, 51423560]

約数ペア:

[(1, 51423560), (2, 25711780), (4, 12855890), (5, 10284712), (8, 6427945), (10, 5142356), (20, 2571178), (40, 1285589), (647, 79480), (1294, 39740), (1987, 25880), (2588, 19870), (3235, 15896), (3974, 12940), (5176, 9935), (6470, 7948)]