81978836

素因数分解:

$2^2\times {\mathrm{401}}^1\times {\mathrm{51109}}^1$

素因数の和:51514

約数の個数: 12

約数和(自身を含む): 143823540

約数和(自身を除く): 61844704

約数列:

[1, 2, 4, 401, 802, 1604, 51109, 102218, 204436, 20494709, 40989418, 81978836]

約数ペア:

[(1, 81978836), (2, 40989418), (4, 20494709), (401, 204436), (802, 102218), (1604, 51109)]