19978521

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{2753}}^1$

素因数の和:2856

約数の個数: 16

約数和(自身を含む): 27760320

約数和(自身を除く): 7781799

約数列:

[1, 3, 41, 59, 123, 177, 2419, 2753, 7257, 8259, 112873, 162427, 338619, 487281, 6659507, 19978521]

約数ペア:

[(1, 19978521), (3, 6659507), (41, 487281), (59, 338619), (123, 162427), (177, 112873), (2419, 8259), (2753, 7257)]