68981680

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{21031}}^1$

素因数の和:21085

約数の個数: 40

約数和(自身を含む): 164301984

約数和(自身を除く): 95320304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 21031, 42062, 84124, 105155, 168248, 210310, 336496, 420620, 841240, 862271, 1682480, 1724542, 3449084, 4311355, 6898168, 8622710, 13796336, 17245420, 34490840, 68981680]

約数ペア:

[(1, 68981680), (2, 34490840), (4, 17245420), (5, 13796336), (8, 8622710), (10, 6898168), (16, 4311355), (20, 3449084), (40, 1724542), (41, 1682480), (80, 862271), (82, 841240), (164, 420620), (205, 336496), (328, 210310), (410, 168248), (656, 105155), (820, 84124), (1640, 42062), (3280, 21031)]