21461781

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:297

約数の個数: 32

約数和(自身を含む): 32394240

約数和(自身を除く): 10932459

約数列:

[1, 3, 11, 33, 59, 73, 151, 177, 219, 453, 649, 803, 1661, 1947, 2409, 4307, 4983, 8909, 11023, 12921, 26727, 33069, 47377, 97999, 121253, 142131, 293997, 363759, 650357, 1951071, 7153927, 21461781]

約数ペア:

[(1, 21461781), (3, 7153927), (11, 1951071), (33, 650357), (59, 363759), (73, 293997), (151, 142131), (177, 121253), (219, 97999), (453, 47377), (649, 33069), (803, 26727), (1661, 12921), (1947, 11023), (2409, 8909), (4307, 4983)]