20403009

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{449}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 14977791

約数列:

[1, 3, 9, 11, 17, 27, 33, 51, 81, 99, 153, 187, 243, 297, 449, 459, 561, 891, 1347, 1377, 1683, 2673, 4041, 4131, 4939, 5049, 7633, 12123, 14817, 15147, 22899, 36369, 44451, 45441, 68697, 83963, 109107, 133353, 206091, 251889, 400059, 618273, 755667, 1200177, 1854819, 2267001, 6801003, 20403009]

約数ペア:

[(1, 20403009), (3, 6801003), (9, 2267001), (11, 1854819), (17, 1200177), (27, 755667), (33, 618273), (51, 400059), (81, 251889), (99, 206091), (153, 133353), (187, 109107), (243, 83963), (297, 68697), (449, 45441), (459, 44451), (561, 36369), (891, 22899), (1347, 15147), (1377, 14817), (1683, 12123), (2673, 7633), (4041, 5049), (4131, 4939)]