21697988

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{7873}}^1$

素因数の和:7943

約数の個数: 24

約数和(自身を含む): 41669208

約数和(自身を除く): 19971220

約数列:

[1, 2, 4, 13, 26, 52, 53, 106, 212, 689, 1378, 2756, 7873, 15746, 31492, 102349, 204698, 409396, 417269, 834538, 1669076, 5424497, 10848994, 21697988]

約数ペア:

[(1, 21697988), (2, 10848994), (4, 5424497), (13, 1669076), (26, 834538), (52, 417269), (53, 409396), (106, 204698), (212, 102349), (689, 31492), (1378, 15746), (2756, 7873)]