20881718

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73013}}^1$

素因数の和:73039

約数の個数: 16

約数和(自身を含む): 36799056

約数和(自身を除く): 15917338

約数列:

[1, 2, 11, 13, 22, 26, 143, 286, 73013, 146026, 803143, 949169, 1606286, 1898338, 10440859, 20881718]

約数ペア:

[(1, 20881718), (2, 10440859), (11, 1898338), (13, 1606286), (22, 949169), (26, 803143), (143, 146026), (286, 73013)]