18885860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{277}}^1\times {\mathrm{487}}^1$

素因数の和:780

約数の個数: 48

約数和(自身を含む): 45583104

約数和(自身を除く): 26697244

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 277, 487, 554, 974, 1108, 1385, 1939, 1948, 2435, 2770, 3409, 3878, 4870, 5540, 6818, 7756, 9695, 9740, 13636, 17045, 19390, 34090, 38780, 68180, 134899, 269798, 539596, 674495, 944293, 1348990, 1888586, 2697980, 3777172, 4721465, 9442930, 18885860]

約数ペア:

[(1, 18885860), (2, 9442930), (4, 4721465), (5, 3777172), (7, 2697980), (10, 1888586), (14, 1348990), (20, 944293), (28, 674495), (35, 539596), (70, 269798), (140, 134899), (277, 68180), (487, 38780), (554, 34090), (974, 19390), (1108, 17045), (1385, 13636), (1939, 9740), (1948, 9695), (2435, 7756), (2770, 6818), (3409, 5540), (3878, 4870)]