20657978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{677}}^1$

素因数の和:782

約数の個数: 32

約数和(自身を含む): 36123840

約数和(自身を除く): 15465862

約数列:

[1, 2, 11, 19, 22, 38, 73, 146, 209, 418, 677, 803, 1354, 1387, 1606, 2774, 7447, 12863, 14894, 15257, 25726, 30514, 49421, 98842, 141493, 282986, 543631, 938999, 1087262, 1877998, 10328989, 20657978]

約数ペア:

[(1, 20657978), (2, 10328989), (11, 1877998), (19, 1087262), (22, 938999), (38, 543631), (73, 282986), (146, 141493), (209, 98842), (418, 49421), (677, 30514), (803, 25726), (1354, 15257), (1387, 14894), (1606, 12863), (2774, 7447)]