18720395

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{1723}}^1$

素因数の和:1822

約数の個数: 16

約数和(自身を含む): 23460192

約数和(自身を除く): 4739797

約数列:

[1, 5, 41, 53, 205, 265, 1723, 2173, 8615, 10865, 70643, 91319, 353215, 456595, 3744079, 18720395]

約数ペア:

[(1, 18720395), (5, 3744079), (41, 456595), (53, 353215), (205, 91319), (265, 70643), (1723, 10865), (2173, 8615)]