18779980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{677}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 42144480

約数和(自身を除く): 23364500

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 73, 76, 95, 146, 190, 292, 365, 380, 677, 730, 1354, 1387, 1460, 2708, 2774, 3385, 5548, 6770, 6935, 12863, 13540, 13870, 25726, 27740, 49421, 51452, 64315, 98842, 128630, 197684, 247105, 257260, 494210, 938999, 988420, 1877998, 3755996, 4694995, 9389990, 18779980]

約数ペア:

[(1, 18779980), (2, 9389990), (4, 4694995), (5, 3755996), (10, 1877998), (19, 988420), (20, 938999), (38, 494210), (73, 257260), (76, 247105), (95, 197684), (146, 128630), (190, 98842), (292, 64315), (365, 51452), (380, 49421), (677, 27740), (730, 25726), (1354, 13870), (1387, 13540), (1460, 12863), (2708, 6935), (2774, 6770), (3385, 5548)]