21070660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81041}}^1$

素因数の和:81063

約数の個数: 24

約数和(自身を含む): 47652696

約数和(自身を除く): 26582036

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81041, 162082, 324164, 405205, 810410, 1053533, 1620820, 2107066, 4214132, 5267665, 10535330, 21070660]

約数ペア:

[(1, 21070660), (2, 10535330), (4, 5267665), (5, 4214132), (10, 2107066), (13, 1620820), (20, 1053533), (26, 810410), (52, 405205), (65, 324164), (130, 162082), (260, 81041)]