19418895

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 35212320

約数和(自身を除く): 15793425

約数列:

[1, 3, 5, 9, 15, 37, 45, 107, 109, 111, 185, 321, 327, 333, 535, 545, 555, 963, 981, 1605, 1635, 1665, 3959, 4033, 4815, 4905, 11663, 11877, 12099, 19795, 20165, 34989, 35631, 36297, 58315, 59385, 60495, 104967, 174945, 178155, 181485, 431531, 524835, 1294593, 2157655, 3883779, 6472965, 19418895]

約数ペア:

[(1, 19418895), (3, 6472965), (5, 3883779), (9, 2157655), (15, 1294593), (37, 524835), (45, 431531), (107, 181485), (109, 178155), (111, 174945), (185, 104967), (321, 60495), (327, 59385), (333, 58315), (535, 36297), (545, 35631), (555, 34989), (963, 20165), (981, 19795), (1605, 12099), (1635, 11877), (1665, 11663), (3959, 4905), (4033, 4815)]