81949712

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{393989}}^1$

素因数の和:394010

約数の個数: 20

約数和(自身を含む): 170991660

約数和(自身を除く): 89041948

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 393989, 787978, 1575956, 3151912, 5121857, 6303824, 10243714, 20487428, 40974856, 81949712]

約数ペア:

[(1, 81949712), (2, 40974856), (4, 20487428), (8, 10243714), (13, 6303824), (16, 5121857), (26, 3151912), (52, 1575956), (104, 787978), (208, 393989)]