199980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1$

素因数の和:127

約数の個数: 72

約数和(自身を含む): 668304

約数和(自身を除く): 468324

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 101, 110, 132, 165, 180, 198, 202, 220, 303, 330, 396, 404, 495, 505, 606, 660, 909, 990, 1010, 1111, 1212, 1515, 1818, 1980, 2020, 2222, 3030, 3333, 3636, 4444, 4545, 5555, 6060, 6666, 9090, 9999, 11110, 13332, 16665, 18180, 19998, 22220, 33330, 39996, 49995, 66660, 99990, 199980]

約数ペア:

[(1, 199980), (2, 99990), (3, 66660), (4, 49995), (5, 39996), (6, 33330), (9, 22220), (10, 19998), (11, 18180), (12, 16665), (15, 13332), (18, 11110), (20, 9999), (22, 9090), (30, 6666), (33, 6060), (36, 5555), (44, 4545), (45, 4444), (55, 3636), (60, 3333), (66, 3030), (90, 2222), (99, 2020), (101, 1980), (110, 1818), (132, 1515), (165, 1212), (180, 1111), (198, 1010), (202, 990), (220, 909), (303, 660), (330, 606), (396, 505), (404, 495)]