21024765

素因数分解:

$3^4\times 5^1\times {\mathrm{51913}}^1$

素因数の和:51930

約数の個数: 20

約数和(自身を含む): 37689564

約数和(自身を除く): 16664799

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51913, 155739, 259565, 467217, 778695, 1401651, 2336085, 4204953, 7008255, 21024765]

約数ペア:

[(1, 21024765), (3, 7008255), (5, 4204953), (9, 2336085), (15, 1401651), (27, 778695), (45, 467217), (81, 259565), (135, 155739), (405, 51913)]