21404115

素因数分解:

$3^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{479}}^1$

素因数の和:824

約数の個数: 32

約数和(自身を含む): 38246400

約数和(自身を除く): 16842285

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 331, 479, 993, 1437, 1655, 2395, 2979, 4311, 4965, 7185, 8937, 12933, 14895, 21555, 44685, 64665, 158549, 475647, 792745, 1426941, 2378235, 4280823, 7134705, 21404115]

約数ペア:

[(1, 21404115), (3, 7134705), (5, 4280823), (9, 2378235), (15, 1426941), (27, 792745), (45, 475647), (135, 158549), (331, 64665), (479, 44685), (993, 21555), (1437, 14895), (1655, 12933), (2395, 8937), (2979, 7185), (4311, 4965)]