81471728

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{391691}}^1$

素因数の和:391712

約数の個数: 20

約数和(自身を含む): 169994328

約数和(自身を除く): 88522600

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 391691, 783382, 1566764, 3133528, 5091983, 6267056, 10183966, 20367932, 40735864, 81471728]

約数ペア:

[(1, 81471728), (2, 40735864), (4, 20367932), (8, 10183966), (13, 6267056), (16, 5091983), (26, 3133528), (52, 1566764), (104, 783382), (208, 391691)]