217685881

素因数分解:

$7^2\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{1087}}^1$

素因数の和:1229

約数の個数: 24

約数和(自身を含む): 261459456

約数和(自身を除く): 43773575

約数列:

[1, 7, 49, 61, 67, 427, 469, 1087, 2989, 3283, 4087, 7609, 28609, 53263, 66307, 72829, 200263, 464149, 509803, 3249043, 3568621, 4442569, 31097983, 217685881]

約数ペア:

[(1, 217685881), (7, 31097983), (49, 4442569), (61, 3568621), (67, 3249043), (427, 509803), (469, 464149), (1087, 200263), (2989, 72829), (3283, 66307), (4087, 53263), (7609, 28609)]