81254128

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{123863}}^1$

素因数の和:123912

約数の個数: 20

約数和(自身を含む): 161270928

約数和(自身を除く): 80016800

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 123863, 247726, 495452, 990904, 1981808, 5078383, 10156766, 20313532, 40627064, 81254128]

約数ペア:

[(1, 81254128), (2, 40627064), (4, 20313532), (8, 10156766), (16, 5078383), (41, 1981808), (82, 990904), (164, 495452), (328, 247726), (656, 123863)]