21559905

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{5507}}^1$

素因数の和:5550

約数の個数: 32

約数和(自身を含む): 39657600

約数和(自身を除く): 18097695

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 261, 435, 783, 1305, 3915, 5507, 16521, 27535, 49563, 82605, 148689, 159703, 247815, 479109, 743445, 798515, 1437327, 2395545, 4311981, 7186635, 21559905]

約数ペア:

[(1, 21559905), (3, 7186635), (5, 4311981), (9, 2395545), (15, 1437327), (27, 798515), (29, 743445), (45, 479109), (87, 247815), (135, 159703), (145, 148689), (261, 82605), (435, 49563), (783, 27535), (1305, 16521), (3915, 5507)]