21097305

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10903}}^1$

素因数の和:10957

約数の個数: 24

約数和(自身を含む): 37422528

約数和(自身を除く): 16325223

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10903, 32709, 54515, 98127, 163545, 468829, 490635, 1406487, 2344145, 4219461, 7032435, 21097305]

約数ペア:

[(1, 21097305), (3, 7032435), (5, 4219461), (9, 2344145), (15, 1406487), (43, 490635), (45, 468829), (129, 163545), (215, 98127), (387, 54515), (645, 32709), (1935, 10903)]