18745168

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{90121}}^1$

素因数の和:90142

約数の個数: 20

約数和(自身を含む): 39112948

約数和(自身を除く): 20367780

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 90121, 180242, 360484, 720968, 1171573, 1441936, 2343146, 4686292, 9372584, 18745168]

約数ペア:

[(1, 18745168), (2, 9372584), (4, 4686292), (8, 2343146), (13, 1441936), (16, 1171573), (26, 720968), (52, 360484), (104, 180242), (208, 90121)]