21043269

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{4861}}^1$

素因数の和:4917

約数の個数: 24

約数和(自身を含む): 33625592

約数和(自身を除く): 12582323

約数列:

[1, 3, 9, 13, 37, 39, 111, 117, 333, 481, 1443, 4329, 4861, 14583, 43749, 63193, 179857, 189579, 539571, 568737, 1618713, 2338141, 7014423, 21043269]

約数ペア:

[(1, 21043269), (3, 7014423), (9, 2338141), (13, 1618713), (37, 568737), (39, 539571), (111, 189579), (117, 179857), (333, 63193), (481, 43749), (1443, 14583), (4329, 4861)]