21518235

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 38918880

約数和(自身を除く): 17400645

約数列:

[1, 3, 5, 9, 15, 41, 45, 107, 109, 123, 205, 321, 327, 369, 535, 545, 615, 963, 981, 1605, 1635, 1845, 4387, 4469, 4815, 4905, 11663, 13161, 13407, 21935, 22345, 34989, 39483, 40221, 58315, 65805, 67035, 104967, 174945, 197415, 201105, 478183, 524835, 1434549, 2390915, 4303647, 7172745, 21518235]

約数ペア:

[(1, 21518235), (3, 7172745), (5, 4303647), (9, 2390915), (15, 1434549), (41, 524835), (45, 478183), (107, 201105), (109, 197415), (123, 174945), (205, 104967), (321, 67035), (327, 65805), (369, 58315), (535, 40221), (545, 39483), (615, 34989), (963, 22345), (981, 21935), (1605, 13407), (1635, 13161), (1845, 11663), (4387, 4905), (4469, 4815)]