128781681

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{1993}}^1$

素因数の和:2201

約数の個数: 32

約数和(自身を含む): 209035008

約数和(自身を除く): 80253327

約数列:

[1, 3, 7, 17, 21, 51, 119, 181, 357, 543, 1267, 1993, 3077, 3801, 5979, 9231, 13951, 21539, 33881, 41853, 64617, 101643, 237167, 360733, 711501, 1082199, 2525131, 6132461, 7575393, 18397383, 42927227, 128781681]

約数ペア:

[(1, 128781681), (3, 42927227), (7, 18397383), (17, 7575393), (21, 6132461), (51, 2525131), (119, 1082199), (181, 711501), (357, 360733), (543, 237167), (1267, 101643), (1993, 64617), (3077, 41853), (3801, 33881), (5979, 21539), (9231, 13951)]