19998990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{20201}}^1$

素因数の和:20225

約数の個数: 48

約数和(自身を含む): 56727216

約数和(自身を除く): 36728226

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990, 20201, 40402, 60603, 101005, 121206, 181809, 202010, 222211, 303015, 363618, 444422, 606030, 666633, 909045, 1111055, 1333266, 1818090, 1999899, 2222110, 3333165, 3999798, 6666330, 9999495, 19998990]

約数ペア:

[(1, 19998990), (2, 9999495), (3, 6666330), (5, 3999798), (6, 3333165), (9, 2222110), (10, 1999899), (11, 1818090), (15, 1333266), (18, 1111055), (22, 909045), (30, 666633), (33, 606030), (45, 444422), (55, 363618), (66, 303015), (90, 222211), (99, 202010), (110, 181809), (165, 121206), (198, 101005), (330, 60603), (495, 40402), (990, 20201)]