19991567205

素因数分解:

$3^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1\times {\mathrm{15973}}^1$

素因数の和:16187

約数の個数: 64

約数和(自身を含む): 36313374720

約数和(自身を除く): 16321807515

約数列:

[1, 3, 5, 9, 15, 27, 45, 73, 127, 135, 219, 365, 381, 635, 657, 1095, 1143, 1905, 1971, 3285, 3429, 5715, 9271, 9855, 15973, 17145, 27813, 46355, 47919, 79865, 83439, 139065, 143757, 239595, 250317, 417195, 431271, 718785, 1166029, 1251585, 2028571, 2156355, 3498087, 5830145, 6085713, 10142855, 10494261, 17490435, 18257139, 30428565, 31482783, 52471305, 54771417, 91285695, 148085683, 157413915, 273857085, 444257049, 740428415, 1332771147, 2221285245, 3998313441, 6663855735, 19991567205]

約数ペア:

[(1, 19991567205), (3, 6663855735), (5, 3998313441), (9, 2221285245), (15, 1332771147), (27, 740428415), (45, 444257049), (73, 273857085), (127, 157413915), (135, 148085683), (219, 91285695), (365, 54771417), (381, 52471305), (635, 31482783), (657, 30428565), (1095, 18257139), (1143, 17490435), (1905, 10494261), (1971, 10142855), (3285, 6085713), (3429, 5830145), (5715, 3498087), (9271, 2156355), (9855, 2028571), (15973, 1251585), (17145, 1166029), (27813, 718785), (46355, 431271), (47919, 417195), (79865, 250317), (83439, 239595), (139065, 143757)]