31931991

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{307}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 57401344

約数和(自身を除く): 25469353

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 127, 273, 307, 381, 819, 889, 921, 1143, 1651, 2149, 2667, 2763, 3991, 4953, 6447, 8001, 11557, 11973, 14859, 19341, 27937, 34671, 35919, 38989, 83811, 104013, 116967, 251433, 272923, 350901, 506857, 818769, 1520571, 2456307, 3547999, 4561713, 10643997, 31931991]

約数ペア:

[(1, 31931991), (3, 10643997), (7, 4561713), (9, 3547999), (13, 2456307), (21, 1520571), (39, 818769), (63, 506857), (91, 350901), (117, 272923), (127, 251433), (273, 116967), (307, 104013), (381, 83811), (819, 38989), (889, 35919), (921, 34671), (1143, 27937), (1651, 19341), (2149, 14859), (2667, 11973), (2763, 11557), (3991, 8001), (4953, 6447)]