21045717

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{191}}^1$

素因数の和:271

約数の個数: 64

約数和(自身を含む): 39813120

約数和(自身を除く): 18767403

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 53, 63, 77, 99, 159, 189, 191, 231, 297, 371, 477, 573, 583, 693, 1113, 1337, 1431, 1719, 1749, 2079, 2101, 3339, 4011, 4081, 5157, 5247, 6303, 10017, 10123, 12033, 12243, 14707, 15741, 18909, 30369, 36099, 36729, 44121, 56727, 70861, 91107, 110187, 111353, 132363, 212583, 273321, 334059, 397089, 637749, 779471, 1002177, 1913247, 2338413, 3006531, 7015239, 21045717]

約数ペア:

[(1, 21045717), (3, 7015239), (7, 3006531), (9, 2338413), (11, 1913247), (21, 1002177), (27, 779471), (33, 637749), (53, 397089), (63, 334059), (77, 273321), (99, 212583), (159, 132363), (189, 111353), (191, 110187), (231, 91107), (297, 70861), (371, 56727), (477, 44121), (573, 36729), (583, 36099), (693, 30369), (1113, 18909), (1337, 15741), (1431, 14707), (1719, 12243), (1749, 12033), (2079, 10123), (2101, 10017), (3339, 6303), (4011, 5247), (4081, 5157)]