21987405

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1033}}^1$

素因数の和:1098

約数の個数: 48

約数和(自身を含む): 42584256

約数和(自身を除く): 20596851

約数列:

[1, 3, 5, 9, 11, 15, 33, 43, 45, 55, 99, 129, 165, 215, 387, 473, 495, 645, 1033, 1419, 1935, 2365, 3099, 4257, 5165, 7095, 9297, 11363, 15495, 21285, 34089, 44419, 46485, 56815, 102267, 133257, 170445, 222095, 399771, 488609, 511335, 666285, 1465827, 1998855, 2443045, 4397481, 7329135, 21987405]

約数ペア:

[(1, 21987405), (3, 7329135), (5, 4397481), (9, 2443045), (11, 1998855), (15, 1465827), (33, 666285), (43, 511335), (45, 488609), (55, 399771), (99, 222095), (129, 170445), (165, 133257), (215, 102267), (387, 56815), (473, 46485), (495, 44419), (645, 34089), (1033, 21285), (1419, 15495), (1935, 11363), (2365, 9297), (3099, 7095), (4257, 5165)]