20989980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{10601}}^1$

素因数の和:10627

約数の個数: 72

約数和(自身を含む): 69464304

約数和(自身を除く): 48474324

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, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 10601, 21202, 31803, 42404, 53005, 63606, 95409, 106010, 116611, 127212, 159015, 190818, 212020, 233222, 318030, 349833, 381636, 466444, 477045, 583055, 636060, 699666, 954090, 1049499, 1166110, 1399332, 1749165, 1908180, 2098998, 2332220, 3498330, 4197996, 5247495, 6996660, 10494990, 20989980]

約数ペア:

[(1, 20989980), (2, 10494990), (3, 6996660), (4, 5247495), (5, 4197996), (6, 3498330), (9, 2332220), (10, 2098998), (11, 1908180), (12, 1749165), (15, 1399332), (18, 1166110), (20, 1049499), (22, 954090), (30, 699666), (33, 636060), (36, 583055), (44, 477045), (45, 466444), (55, 381636), (60, 349833), (66, 318030), (90, 233222), (99, 212020), (110, 190818), (132, 159015), (165, 127212), (180, 116611), (198, 106010), (220, 95409), (330, 63606), (396, 53005), (495, 42404), (660, 31803), (990, 21202), (1980, 10601)]