161221319

素因数分解:

$7^3\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{643}}^1$

素因数の和:724

約数の個数: 32

約数和(自身を含む): 204019200

約数和(自身を除く): 42797881

約数列:

[1, 7, 17, 43, 49, 119, 301, 343, 643, 731, 833, 2107, 4501, 5117, 5831, 10931, 14749, 27649, 31507, 35819, 76517, 193543, 220549, 250733, 470033, 535619, 1354801, 3290231, 3749333, 9483607, 23031617, 161221319]

約数ペア:

[(1, 161221319), (7, 23031617), (17, 9483607), (43, 3749333), (49, 3290231), (119, 1354801), (301, 535619), (343, 470033), (643, 250733), (731, 220549), (833, 193543), (2107, 76517), (4501, 35819), (5117, 31507), (5831, 27649), (10931, 14749)]