21147555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{9859}}^1$

素因数の和:9891

約数の個数: 32

約数和(自身を含む): 39755520

約数和(自身を除く): 18607965

約数列:

[1, 3, 5, 11, 13, 15, 33, 39, 55, 65, 143, 165, 195, 429, 715, 2145, 9859, 29577, 49295, 108449, 128167, 147885, 325347, 384501, 542245, 640835, 1409837, 1626735, 1922505, 4229511, 7049185, 21147555]

約数ペア:

[(1, 21147555), (3, 7049185), (5, 4229511), (11, 1922505), (13, 1626735), (15, 1409837), (33, 640835), (39, 542245), (55, 384501), (65, 325347), (143, 147885), (165, 128167), (195, 108449), (429, 49295), (715, 29577), (2145, 9859)]