5140820

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{641}}^1$

素因数の和:1051

約数の個数: 24

約数和(自身を含む): 10839528

約数和(自身を除く): 5698708

約数列:

[1, 2, 4, 5, 10, 20, 401, 641, 802, 1282, 1604, 2005, 2564, 3205, 4010, 6410, 8020, 12820, 257041, 514082, 1028164, 1285205, 2570410, 5140820]

約数ペア:

[(1, 5140820), (2, 2570410), (4, 1285205), (5, 1028164), (10, 514082), (20, 257041), (401, 12820), (641, 8020), (802, 6410), (1282, 4010), (1604, 3205), (2005, 2564)]