81316240

素因数分解:

$2^4\times 5^1\times {\mathrm{1016453}}^1$

素因数の和:1016466

約数の個数: 20

約数和(自身を含む): 189060444

約数和(自身を除く): 107744204

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1016453, 2032906, 4065812, 5082265, 8131624, 10164530, 16263248, 20329060, 40658120, 81316240]

約数ペア:

[(1, 81316240), (2, 40658120), (4, 20329060), (5, 16263248), (8, 10164530), (10, 8131624), (16, 5082265), (20, 4065812), (40, 2032906), (80, 1016453)]