20398469

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{401}}^1$

素因数の和:477

約数の個数: 24

約数和(自身を含む): 25895232

約数和(自身を除く): 5496763

約数列:

[1, 7, 13, 43, 91, 169, 301, 401, 559, 1183, 2807, 3913, 5213, 7267, 17243, 36491, 50869, 67769, 120701, 224159, 474383, 1569113, 2914067, 20398469]

約数ペア:

[(1, 20398469), (7, 2914067), (13, 1569113), (43, 474383), (91, 224159), (169, 120701), (301, 67769), (401, 50869), (559, 36491), (1183, 17243), (2807, 7267), (3913, 5213)]