21147615

素因数分解:

$3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{3643}}^1$

素因数の和:3700

約数の個数: 32

約数和(自身を含む): 38480640

約数和(自身を除く): 17333025

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 129, 135, 215, 387, 645, 1161, 1935, 3643, 5805, 10929, 18215, 32787, 54645, 98361, 156649, 163935, 469947, 491805, 783245, 1409841, 2349735, 4229523, 7049205, 21147615]

約数ペア:

[(1, 21147615), (3, 7049205), (5, 4229523), (9, 2349735), (15, 1409841), (27, 783245), (43, 491805), (45, 469947), (129, 163935), (135, 156649), (215, 98361), (387, 54645), (645, 32787), (1161, 18215), (1935, 10929), (3643, 5805)]