81401008

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{391351}}^1$

素因数の和:391372

約数の個数: 20

約数和(自身を含む): 169846768

約数和(自身を除く): 88445760

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 391351, 782702, 1565404, 3130808, 5087563, 6261616, 10175126, 20350252, 40700504, 81401008]

約数ペア:

[(1, 81401008), (2, 40700504), (4, 20350252), (8, 10175126), (13, 6261616), (16, 5087563), (26, 3130808), (52, 1565404), (104, 782702), (208, 391351)]