66638416

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{320377}}^1$

素因数の和:320398

約数の個数: 20

約数和(自身を含む): 139044052

約数和(自身を除く): 72405636

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 320377, 640754, 1281508, 2563016, 4164901, 5126032, 8329802, 16659604, 33319208, 66638416]

約数ペア:

[(1, 66638416), (2, 33319208), (4, 16659604), (8, 8329802), (13, 5126032), (16, 4164901), (26, 2563016), (52, 1281508), (104, 640754), (208, 320377)]