21899553

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{67}}^1$

素因数の和:146

約数の個数: 48

約数和(自身を含む): 35071680

約数和(自身を除く): 13172127

約数列:

[1, 3, 13, 17, 29, 39, 51, 67, 87, 201, 221, 289, 377, 493, 663, 867, 871, 1131, 1139, 1479, 1943, 2613, 3417, 3757, 5829, 6409, 8381, 11271, 14807, 19227, 19363, 25143, 25259, 33031, 44421, 58089, 75777, 99093, 108953, 251719, 326859, 429403, 561527, 755157, 1288209, 1684581, 7299851, 21899553]

約数ペア:

[(1, 21899553), (3, 7299851), (13, 1684581), (17, 1288209), (29, 755157), (39, 561527), (51, 429403), (67, 326859), (87, 251719), (201, 108953), (221, 99093), (289, 75777), (377, 58089), (493, 44421), (663, 33031), (867, 25259), (871, 25143), (1131, 19363), (1139, 19227), (1479, 14807), (1943, 11271), (2613, 8381), (3417, 6409), (3757, 5829)]