21788055

素因数分解:

$3^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{643}}^1$

素因数の和:908

約数の個数: 32

約数和(自身を含む): 38949120

約数和(自身を除く): 17161065

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 251, 643, 753, 1255, 1929, 2259, 3215, 3765, 5787, 6777, 9645, 11295, 17361, 28935, 33885, 86805, 161393, 484179, 806965, 1452537, 2420895, 4357611, 7262685, 21788055]

約数ペア:

[(1, 21788055), (3, 7262685), (5, 4357611), (9, 2420895), (15, 1452537), (27, 806965), (45, 484179), (135, 161393), (251, 86805), (643, 33885), (753, 28935), (1255, 17361), (1929, 11295), (2259, 9645), (3215, 6777), (3765, 5787)]