81609580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{313883}}^1$

素因数の和:313905

約数の個数: 24

約数和(自身を含む): 184563792

約数和(自身を除く): 102954212

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 313883, 627766, 1255532, 1569415, 3138830, 4080479, 6277660, 8160958, 16321916, 20402395, 40804790, 81609580]

約数ペア:

[(1, 81609580), (2, 40804790), (4, 20402395), (5, 16321916), (10, 8160958), (13, 6277660), (20, 4080479), (26, 3138830), (52, 1569415), (65, 1255532), (130, 627766), (260, 313883)]