18801880

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:268

約数の個数: 64

約数和(自身を含む): 44115840

約数和(自身を除く): 25313960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 73, 94, 137, 146, 188, 235, 274, 292, 365, 376, 470, 548, 584, 685, 730, 940, 1096, 1370, 1460, 1880, 2740, 2920, 3431, 5480, 6439, 6862, 10001, 12878, 13724, 17155, 20002, 25756, 27448, 32195, 34310, 40004, 50005, 51512, 64390, 68620, 80008, 100010, 128780, 137240, 200020, 257560, 400040, 470047, 940094, 1880188, 2350235, 3760376, 4700470, 9400940, 18801880]

約数ペア:

[(1, 18801880), (2, 9400940), (4, 4700470), (5, 3760376), (8, 2350235), (10, 1880188), (20, 940094), (40, 470047), (47, 400040), (73, 257560), (94, 200020), (137, 137240), (146, 128780), (188, 100010), (235, 80008), (274, 68620), (292, 64390), (365, 51512), (376, 50005), (470, 40004), (548, 34310), (584, 32195), (685, 27448), (730, 25756), (940, 20002), (1096, 17155), (1370, 13724), (1460, 12878), (1880, 10001), (2740, 6862), (2920, 6439), (3431, 5480)]