221076961

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{191}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 269660160

約数和(自身を除く): 48583199

約数列:

[1, 7, 37, 41, 109, 191, 259, 287, 763, 1337, 1517, 4033, 4469, 7067, 7831, 10619, 20819, 28231, 31283, 49469, 54817, 145733, 165353, 289747, 770303, 853579, 1157471, 2028229, 5392121, 5975053, 31582423, 221076961]

約数ペア:

[(1, 221076961), (7, 31582423), (37, 5975053), (41, 5392121), (109, 2028229), (191, 1157471), (259, 853579), (287, 770303), (763, 289747), (1337, 165353), (1517, 145733), (4033, 54817), (4469, 49469), (7067, 31283), (7831, 28231), (10619, 20819)]