28191321

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{347}}^1$

素因数の和:435

約数の個数: 40

約数和(自身を含む): 45476640

約数和(自身を除く): 17285319

約数列:

[1, 3, 9, 17, 27, 51, 59, 81, 153, 177, 347, 459, 531, 1003, 1041, 1377, 1593, 3009, 3123, 4779, 5899, 9027, 9369, 17697, 20473, 27081, 28107, 53091, 61419, 81243, 159273, 184257, 348041, 477819, 552771, 1044123, 1658313, 3132369, 9397107, 28191321]

約数ペア:

[(1, 28191321), (3, 9397107), (9, 3132369), (17, 1658313), (27, 1044123), (51, 552771), (59, 477819), (81, 348041), (153, 184257), (177, 159273), (347, 81243), (459, 61419), (531, 53091), (1003, 28107), (1041, 27081), (1377, 20473), (1593, 17697), (3009, 9369), (3123, 9027), (4779, 5899)]