21125908

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{1019}}^1$

素因数の和:1167

約数の個数: 24

約数和(自身を含む): 38041920

約数和(自身を除く): 16916012

約数列:

[1, 2, 4, 71, 73, 142, 146, 284, 292, 1019, 2038, 4076, 5183, 10366, 20732, 72349, 74387, 144698, 148774, 289396, 297548, 5281477, 10562954, 21125908]

約数ペア:

[(1, 21125908), (2, 10562954), (4, 5281477), (71, 297548), (73, 289396), (142, 148774), (146, 144698), (284, 74387), (292, 72349), (1019, 20732), (2038, 10366), (4076, 5183)]