21054080

素因数分解:

$2^7\times 5^1\times {\mathrm{67}}^1\times {\mathrm{491}}^1$

素因数の和:577

約数の個数: 64

約数和(自身を含む): 51187680

約数和(自身を除く): 30133600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 67, 80, 128, 134, 160, 268, 320, 335, 491, 536, 640, 670, 982, 1072, 1340, 1964, 2144, 2455, 2680, 3928, 4288, 4910, 5360, 7856, 8576, 9820, 10720, 15712, 19640, 21440, 31424, 32897, 39280, 42880, 62848, 65794, 78560, 131588, 157120, 164485, 263176, 314240, 328970, 526352, 657940, 1052704, 1315880, 2105408, 2631760, 4210816, 5263520, 10527040, 21054080]

約数ペア:

[(1, 21054080), (2, 10527040), (4, 5263520), (5, 4210816), (8, 2631760), (10, 2105408), (16, 1315880), (20, 1052704), (32, 657940), (40, 526352), (64, 328970), (67, 314240), (80, 263176), (128, 164485), (134, 157120), (160, 131588), (268, 78560), (320, 65794), (335, 62848), (491, 42880), (536, 39280), (640, 32897), (670, 31424), (982, 21440), (1072, 19640), (1340, 15712), (1964, 10720), (2144, 9820), (2455, 8576), (2680, 7856), (3928, 5360), (4288, 4910)]