20181395

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{4373}}^1$

素因数の和:4462

約数の個数: 16

約数和(自身を含む): 26453952

約数和(自身を除く): 6272557

約数列:

[1, 5, 13, 65, 71, 355, 923, 4373, 4615, 21865, 56849, 284245, 310483, 1552415, 4036279, 20181395]

約数ペア:

[(1, 20181395), (5, 4036279), (13, 1552415), (65, 310483), (71, 284245), (355, 56849), (923, 21865), (4373, 4615)]