206987991

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1\times {\mathrm{1123}}^1$

素因数の和:1331

約数の個数: 32

約数和(自身を含む): 322848768

約数和(自身を除く): 115860777

約数列:

[1, 3, 7, 21, 67, 131, 201, 393, 469, 917, 1123, 1407, 2751, 3369, 7861, 8777, 23583, 26331, 61439, 75241, 147113, 184317, 225723, 441339, 526687, 1029791, 1580061, 3089373, 9856571, 29569713, 68995997, 206987991]

約数ペア:

[(1, 206987991), (3, 68995997), (7, 29569713), (21, 9856571), (67, 3089373), (131, 1580061), (201, 1029791), (393, 526687), (469, 441339), (917, 225723), (1123, 184317), (1407, 147113), (2751, 75241), (3369, 61439), (7861, 26331), (8777, 23583)]