21615579

素因数分解:

$3^6\times {\mathrm{149}}^1\times {\mathrm{199}}^1$

素因数の和:366

約数の個数: 28

約数和(自身を含む): 32790000

約数和(自身を除く): 11174421

約数列:

[1, 3, 9, 27, 81, 149, 199, 243, 447, 597, 729, 1341, 1791, 4023, 5373, 12069, 16119, 29651, 36207, 48357, 88953, 108621, 145071, 266859, 800577, 2401731, 7205193, 21615579]

約数ペア:

[(1, 21615579), (3, 7205193), (9, 2401731), (27, 800577), (81, 266859), (149, 145071), (199, 108621), (243, 88953), (447, 48357), (597, 36207), (729, 29651), (1341, 16119), (1791, 12069), (4023, 5373)]