81943888

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{393961}}^1$

素因数の和:393982

約数の個数: 20

約数和(自身を含む): 170979508

約数和(自身を除く): 89035620

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 393961, 787922, 1575844, 3151688, 5121493, 6303376, 10242986, 20485972, 40971944, 81943888]

約数ペア:

[(1, 81943888), (2, 40971944), (4, 20485972), (8, 10242986), (13, 6303376), (16, 5121493), (26, 3151688), (52, 1575844), (104, 787922), (208, 393961)]