21490155

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12907}}^1$

素因数の和:12955

約数の個数: 24

約数和(自身を含む): 38259312

約数和(自身を除く): 16769157

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12907, 38721, 64535, 116163, 193605, 477559, 580815, 1432677, 2387795, 4298031, 7163385, 21490155]

約数ペア:

[(1, 21490155), (3, 7163385), (5, 4298031), (9, 2387795), (15, 1432677), (37, 580815), (45, 477559), (111, 193605), (185, 116163), (333, 64535), (555, 38721), (1665, 12907)]