19377981

素因数分解:

$3^3\times 7^2\times {\mathrm{97}}^1\times {\mathrm{151}}^1$

素因数の和:271

約数の個数: 48

約数和(自身を含む): 33962880

約数和(自身を除く): 14584899

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 97, 147, 151, 189, 291, 441, 453, 679, 873, 1057, 1323, 1359, 2037, 2619, 3171, 4077, 4753, 6111, 7399, 9513, 14259, 14647, 18333, 22197, 28539, 42777, 43941, 66591, 102529, 128331, 131823, 199773, 307587, 395469, 717703, 922761, 2153109, 2768283, 6459327, 19377981]

約数ペア:

[(1, 19377981), (3, 6459327), (7, 2768283), (9, 2153109), (21, 922761), (27, 717703), (49, 395469), (63, 307587), (97, 199773), (147, 131823), (151, 128331), (189, 102529), (291, 66591), (441, 43941), (453, 42777), (679, 28539), (873, 22197), (1057, 18333), (1323, 14647), (1359, 14259), (2037, 9513), (2619, 7399), (3171, 6111), (4077, 4753)]