21508605

素因数分解:

$3^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1489}}^1$

素因数の和:1610

約数の個数: 32

約数和(自身を含む): 38620800

約数和(自身を除く): 17112195

約数列:

[1, 3, 5, 9, 15, 27, 45, 107, 135, 321, 535, 963, 1489, 1605, 2889, 4467, 4815, 7445, 13401, 14445, 22335, 40203, 67005, 159323, 201015, 477969, 796615, 1433907, 2389845, 4301721, 7169535, 21508605]

約数ペア:

[(1, 21508605), (3, 7169535), (5, 4301721), (9, 2389845), (15, 1433907), (27, 796615), (45, 477969), (107, 201015), (135, 159323), (321, 67005), (535, 40203), (963, 22335), (1489, 14445), (1605, 13401), (2889, 7445), (4467, 4815)]