81639896

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{307}}^1\times {\mathrm{2557}}^1$

素因数の和:2883

約数の個数: 32

約数和(自身を含む): 165451440

約数和(自身を除く): 83811544

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 307, 614, 1228, 2456, 2557, 3991, 5114, 7982, 10228, 15964, 20456, 31928, 33241, 66482, 132964, 265928, 784999, 1569998, 3139996, 6279992, 10204987, 20409974, 40819948, 81639896]

約数ペア:

[(1, 81639896), (2, 40819948), (4, 20409974), (8, 10204987), (13, 6279992), (26, 3139996), (52, 1569998), (104, 784999), (307, 265928), (614, 132964), (1228, 66482), (2456, 33241), (2557, 31928), (3991, 20456), (5114, 15964), (7982, 10228)]