21409575

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{25951}}^1$

素因数の和:25975

約数の個数: 24

約数和(自身を含む): 38616576

約数和(自身を除く): 17207001

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 165, 275, 825, 25951, 77853, 129755, 285461, 389265, 648775, 856383, 1427305, 1946325, 4281915, 7136525, 21409575]

約数ペア:

[(1, 21409575), (3, 7136525), (5, 4281915), (11, 1946325), (15, 1427305), (25, 856383), (33, 648775), (55, 389265), (75, 285461), (165, 129755), (275, 77853), (825, 25951)]