21516620

素因数分解:

$2^2\times 5^1\times {\mathrm{769}}^1\times {\mathrm{1399}}^1$

素因数の和:2177

約数の個数: 24

約数和(自身を含む): 45276000

約数和(自身を除く): 23759380

約数列:

[1, 2, 4, 5, 10, 20, 769, 1399, 1538, 2798, 3076, 3845, 5596, 6995, 7690, 13990, 15380, 27980, 1075831, 2151662, 4303324, 5379155, 10758310, 21516620]

約数ペア:

[(1, 21516620), (2, 10758310), (4, 5379155), (5, 4303324), (10, 2151662), (20, 1075831), (769, 27980), (1399, 15380), (1538, 13990), (2798, 7690), (3076, 6995), (3845, 5596)]