638570247

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{646981}}^1$

素因数の和:647038

約数の個数: 16

約数和(自身を含む): 993764352

約数和(自身を除く): 355194105

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 646981, 1940943, 4528867, 13586601, 30408107, 91224321, 212856749, 638570247]

約数ペア:

[(1, 638570247), (3, 212856749), (7, 91224321), (21, 30408107), (47, 13586601), (141, 4528867), (329, 1940943), (987, 646981)]