2638209

素因数分解:

$3^1\times 7^2\times {\mathrm{131}}^1\times {\mathrm{137}}^1$

素因数の和:285

約数の個数: 24

約数和(自身を含む): 4153248

約数和(自身を除く): 1515039

約数列:

[1, 3, 7, 21, 49, 131, 137, 147, 393, 411, 917, 959, 2751, 2877, 6419, 6713, 17947, 19257, 20139, 53841, 125629, 376887, 879403, 2638209]

約数ペア:

[(1, 2638209), (3, 879403), (7, 376887), (21, 125629), (49, 53841), (131, 20139), (137, 19257), (147, 17947), (393, 6713), (411, 6419), (917, 2877), (959, 2751)]