21177805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12421}}^1$

素因数の和:12468

約数の個数: 16

約数和(自身を含む): 28620288

約数和(自身を除く): 7442483

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12421, 62105, 136631, 385051, 683155, 1925255, 4235561, 21177805]

約数ペア:

[(1, 21177805), (5, 4235561), (11, 1925255), (31, 683155), (55, 385051), (155, 136631), (341, 62105), (1705, 12421)]