19997523

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2713}}^1$

素因数の和:2745

約数の個数: 40

約数和(自身を含む): 36780128

約数和(自身を除く): 16782605

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 2713, 7371, 8139, 18991, 24417, 35269, 56973, 73251, 105807, 170919, 219753, 246883, 317421, 512757, 740649, 952263, 1538271, 2221947, 2856789, 6665841, 19997523]

約数ペア:

[(1, 19997523), (3, 6665841), (7, 2856789), (9, 2221947), (13, 1538271), (21, 952263), (27, 740649), (39, 512757), (63, 317421), (81, 246883), (91, 219753), (117, 170919), (189, 105807), (273, 73251), (351, 56973), (567, 35269), (819, 24417), (1053, 18991), (2457, 8139), (2713, 7371)]