18889720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27779}}^1$

素因数の和:27807

約数の個数: 32

約数和(自身を含む): 45003600

約数和(自身を除く): 26113880

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 27779, 55558, 111116, 138895, 222232, 277790, 472243, 555580, 944486, 1111160, 1888972, 2361215, 3777944, 4722430, 9444860, 18889720]

約数ペア:

[(1, 18889720), (2, 9444860), (4, 4722430), (5, 3777944), (8, 2361215), (10, 1888972), (17, 1111160), (20, 944486), (34, 555580), (40, 472243), (68, 277790), (85, 222232), (136, 138895), (170, 111116), (340, 55558), (680, 27779)]