2781639

素因数分解:

$3^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{659}}^1$

素因数の和:739

約数の個数: 24

約数和(自身を含む): 4667520

約数和(自身を除く): 1885881

約数列:

[1, 3, 7, 9, 21, 63, 67, 201, 469, 603, 659, 1407, 1977, 4221, 4613, 5931, 13839, 41517, 44153, 132459, 309071, 397377, 927213, 2781639]

約数ペア:

[(1, 2781639), (3, 927213), (7, 397377), (9, 309071), (21, 132459), (63, 44153), (67, 41517), (201, 13839), (469, 5931), (603, 4613), (659, 4221), (1407, 1977)]