21218012

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{1249}}^1$

素因数の和:1421

約数の個数: 24

約数和(自身を含む): 38640000

約数和(自身を除く): 17421988

約数列:

[1, 2, 4, 31, 62, 124, 137, 274, 548, 1249, 2498, 4247, 4996, 8494, 16988, 38719, 77438, 154876, 171113, 342226, 684452, 5304503, 10609006, 21218012]

約数ペア:

[(1, 21218012), (2, 10609006), (4, 5304503), (31, 684452), (62, 342226), (124, 171113), (137, 154876), (274, 77438), (548, 38719), (1249, 16988), (2498, 8494), (4247, 4996)]