19956555

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1373}}^1$

素因数の和:1420

約数の個数: 48

約数和(自身を含む): 38581920

約数和(自身を除く): 18625365

約数列:

[1, 3, 5, 9, 15, 17, 19, 45, 51, 57, 85, 95, 153, 171, 255, 285, 323, 765, 855, 969, 1373, 1615, 2907, 4119, 4845, 6865, 12357, 14535, 20595, 23341, 26087, 61785, 70023, 78261, 116705, 130435, 210069, 234783, 350115, 391305, 443479, 1050345, 1173915, 1330437, 2217395, 3991311, 6652185, 19956555]

約数ペア:

[(1, 19956555), (3, 6652185), (5, 3991311), (9, 2217395), (15, 1330437), (17, 1173915), (19, 1050345), (45, 443479), (51, 391305), (57, 350115), (85, 234783), (95, 210069), (153, 130435), (171, 116705), (255, 78261), (285, 70023), (323, 61785), (765, 26087), (855, 23341), (969, 20595), (1373, 14535), (1615, 12357), (2907, 6865), (4119, 4845)]