20455010

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5101}}^1$

素因数の和:5509

約数の個数: 16

約数和(自身を含む): 36918072

約数和(自身を除く): 16463062

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 5101, 10202, 25505, 51010, 2045501, 4091002, 10227505, 20455010]

約数ペア:

[(1, 20455010), (2, 10227505), (5, 4091002), (10, 2045501), (401, 51010), (802, 25505), (2005, 10202), (4010, 5101)]