777788780

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{809}}^1\times {\mathrm{907}}^1$

素因数の和:1778

約数の個数: 48

約数和(自身を含む): 1668068640

約数和(自身を除く): 890279860

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 809, 907, 1060, 1618, 1814, 3236, 3628, 4045, 4535, 8090, 9070, 16180, 18140, 42877, 48071, 85754, 96142, 171508, 192284, 214385, 240355, 428770, 480710, 733763, 857540, 961420, 1467526, 2935052, 3668815, 7337630, 14675260, 38889439, 77778878, 155557756, 194447195, 388894390, 777788780]

約数ペア:

[(1, 777788780), (2, 388894390), (4, 194447195), (5, 155557756), (10, 77778878), (20, 38889439), (53, 14675260), (106, 7337630), (212, 3668815), (265, 2935052), (530, 1467526), (809, 961420), (907, 857540), (1060, 733763), (1618, 480710), (1814, 428770), (3236, 240355), (3628, 214385), (4045, 192284), (4535, 171508), (8090, 96142), (9070, 85754), (16180, 48071), (18140, 42877)]