18919888

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{6997}}^1$

素因数の和:7031

約数の個数: 30

約数和(自身を含む): 39699654

約数和(自身を除く): 20779766

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 169, 208, 338, 676, 1352, 2704, 6997, 13994, 27988, 55976, 90961, 111952, 181922, 363844, 727688, 1182493, 1455376, 2364986, 4729972, 9459944, 18919888]

約数ペア:

[(1, 18919888), (2, 9459944), (4, 4729972), (8, 2364986), (13, 1455376), (16, 1182493), (26, 727688), (52, 363844), (104, 181922), (169, 111952), (208, 90961), (338, 55976), (676, 27988), (1352, 13994), (2704, 6997)]