19721943

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:192

約数の個数: 48

約数和(自身を含む): 32104800

約数和(自身を除く): 12382857

約数列:

[1, 3, 9, 19, 29, 41, 57, 87, 97, 123, 171, 261, 291, 369, 551, 779, 873, 1189, 1653, 1843, 2337, 2813, 3567, 3977, 4959, 5529, 7011, 8439, 10701, 11931, 16587, 22591, 25317, 35793, 53447, 67773, 75563, 115333, 160341, 203319, 226689, 345999, 481023, 680067, 1037997, 2191327, 6573981, 19721943]

約数ペア:

[(1, 19721943), (3, 6573981), (9, 2191327), (19, 1037997), (29, 680067), (41, 481023), (57, 345999), (87, 226689), (97, 203319), (123, 160341), (171, 115333), (261, 75563), (291, 67773), (369, 53447), (551, 35793), (779, 25317), (873, 22591), (1189, 16587), (1653, 11931), (1843, 10701), (2337, 8439), (2813, 7011), (3567, 5529), (3977, 4959)]