20399940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{10303}}^1$

素因数の和:10329

約数の個数: 72

約数和(自身を含む): 67511808

約数和(自身を除く): 47111868

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, 10303, 20606, 30909, 41212, 51515, 61818, 92727, 103030, 113333, 123636, 154545, 185454, 206060, 226666, 309090, 339999, 370908, 453332, 463635, 566665, 618180, 679998, 927270, 1019997, 1133330, 1359996, 1699995, 1854540, 2039994, 2266660, 3399990, 4079988, 5099985, 6799980, 10199970, 20399940]

約数ペア:

[(1, 20399940), (2, 10199970), (3, 6799980), (4, 5099985), (5, 4079988), (6, 3399990), (9, 2266660), (10, 2039994), (11, 1854540), (12, 1699995), (15, 1359996), (18, 1133330), (20, 1019997), (22, 927270), (30, 679998), (33, 618180), (36, 566665), (44, 463635), (45, 453332), (55, 370908), (60, 339999), (66, 309090), (90, 226666), (99, 206060), (110, 185454), (132, 154545), (165, 123636), (180, 113333), (198, 103030), (220, 92727), (330, 61818), (396, 51515), (495, 41212), (660, 30909), (990, 20606), (1980, 10303)]