21401655

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{129707}}^1$

素因数の和:129726

約数の個数: 16

約数和(自身を含む): 37355904

約数和(自身を除く): 15954249

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 129707, 389121, 648535, 1426777, 1945605, 4280331, 7133885, 21401655]

約数ペア:

[(1, 21401655), (3, 7133885), (5, 4280331), (11, 1945605), (15, 1426777), (33, 648535), (55, 389121), (165, 129707)]