19788880

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:356

約数の個数: 80

約数和(自身を含む): 49639680

約数和(自身を除く): 29850800

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 47, 76, 80, 94, 95, 152, 188, 190, 235, 277, 304, 376, 380, 470, 554, 752, 760, 893, 940, 1108, 1385, 1520, 1786, 1880, 2216, 2770, 3572, 3760, 4432, 4465, 5263, 5540, 7144, 8930, 10526, 11080, 13019, 14288, 17860, 21052, 22160, 26038, 26315, 35720, 42104, 52076, 52630, 65095, 71440, 84208, 104152, 105260, 130190, 208304, 210520, 247361, 260380, 421040, 494722, 520760, 989444, 1041520, 1236805, 1978888, 2473610, 3957776, 4947220, 9894440, 19788880]

約数ペア:

[(1, 19788880), (2, 9894440), (4, 4947220), (5, 3957776), (8, 2473610), (10, 1978888), (16, 1236805), (19, 1041520), (20, 989444), (38, 520760), (40, 494722), (47, 421040), (76, 260380), (80, 247361), (94, 210520), (95, 208304), (152, 130190), (188, 105260), (190, 104152), (235, 84208), (277, 71440), (304, 65095), (376, 52630), (380, 52076), (470, 42104), (554, 35720), (752, 26315), (760, 26038), (893, 22160), (940, 21052), (1108, 17860), (1385, 14288), (1520, 13019), (1786, 11080), (1880, 10526), (2216, 8930), (2770, 7144), (3572, 5540), (3760, 5263), (4432, 4465)]