18883989

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{647}}^1$

素因数の和:726

約数の個数: 32

約数和(自身を含む): 29859840

約数和(自身を除く): 10975851

約数列:

[1, 3, 9, 23, 27, 47, 69, 141, 207, 423, 621, 647, 1081, 1269, 1941, 3243, 5823, 9729, 14881, 17469, 29187, 30409, 44643, 91227, 133929, 273681, 401787, 699407, 821043, 2098221, 6294663, 18883989]

約数ペア:

[(1, 18883989), (3, 6294663), (9, 2098221), (23, 821043), (27, 699407), (47, 401787), (69, 273681), (141, 133929), (207, 91227), (423, 44643), (621, 30409), (647, 29187), (1081, 17469), (1269, 14881), (1941, 9729), (3243, 5823)]