217987395

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1\times {\mathrm{1039}}^1$

素因数の和:1315

約数の個数: 32

約数和(自身を含む): 355829760

約数和(自身を除く): 137842365

約数列:

[1, 3, 5, 15, 71, 197, 213, 355, 591, 985, 1039, 1065, 2955, 3117, 5195, 13987, 15585, 41961, 69935, 73769, 204683, 209805, 221307, 368845, 614049, 1023415, 1106535, 3070245, 14532493, 43597479, 72662465, 217987395]

約数ペア:

[(1, 217987395), (3, 72662465), (5, 43597479), (15, 14532493), (71, 3070245), (197, 1106535), (213, 1023415), (355, 614049), (591, 368845), (985, 221307), (1039, 209805), (1065, 204683), (2955, 73769), (3117, 69935), (5195, 41961), (13987, 15585)]