21090776

素因数分解:

$2^3\times 7^2\times {\mathrm{173}}^1\times {\mathrm{311}}^1$

素因数の和:504

約数の個数: 48

約数和(自身を含む): 46416240

約数和(自身を除く): 25325464

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 173, 196, 311, 346, 392, 622, 692, 1211, 1244, 1384, 2177, 2422, 2488, 4354, 4844, 8477, 8708, 9688, 15239, 16954, 17416, 30478, 33908, 53803, 60956, 67816, 107606, 121912, 215212, 376621, 430424, 753242, 1506484, 2636347, 3012968, 5272694, 10545388, 21090776]

約数ペア:

[(1, 21090776), (2, 10545388), (4, 5272694), (7, 3012968), (8, 2636347), (14, 1506484), (28, 753242), (49, 430424), (56, 376621), (98, 215212), (173, 121912), (196, 107606), (311, 67816), (346, 60956), (392, 53803), (622, 33908), (692, 30478), (1211, 17416), (1244, 16954), (1384, 15239), (2177, 9688), (2422, 8708), (2488, 8477), (4354, 4844)]