20645886

素因数分解:

$2^1\times 3^1\times {\mathrm{401}}^1\times {\mathrm{8581}}^1$

素因数の和:8987

約数の個数: 16

約数和(自身を含む): 41399568

約数和(自身を除く): 20753682

約数列:

[1, 2, 3, 6, 401, 802, 1203, 2406, 8581, 17162, 25743, 51486, 3440981, 6881962, 10322943, 20645886]

約数ペア:

[(1, 20645886), (2, 10322943), (3, 6881962), (6, 3440981), (401, 51486), (802, 25743), (1203, 17162), (2406, 8581)]