28478940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{67807}}^1$

素因数の和:67826

約数の個数: 48

約数和(自身を含む): 91133952

約数和(自身を除く): 62655012

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 67807, 135614, 203421, 271228, 339035, 406842, 474649, 678070, 813684, 949298, 1017105, 1356140, 1423947, 1898596, 2034210, 2373245, 2847894, 4068420, 4746490, 5695788, 7119735, 9492980, 14239470, 28478940]

約数ペア:

[(1, 28478940), (2, 14239470), (3, 9492980), (4, 7119735), (5, 5695788), (6, 4746490), (7, 4068420), (10, 2847894), (12, 2373245), (14, 2034210), (15, 1898596), (20, 1423947), (21, 1356140), (28, 1017105), (30, 949298), (35, 813684), (42, 678070), (60, 474649), (70, 406842), (84, 339035), (105, 271228), (140, 203421), (210, 135614), (420, 67807)]