21457540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82529}}^1$

素因数の和:82551

約数の個数: 24

約数和(自身を含む): 48527640

約数和(自身を除く): 27070100

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82529, 165058, 330116, 412645, 825290, 1072877, 1650580, 2145754, 4291508, 5364385, 10728770, 21457540]

約数ペア:

[(1, 21457540), (2, 10728770), (4, 5364385), (5, 4291508), (10, 2145754), (13, 1650580), (20, 1072877), (26, 825290), (52, 412645), (65, 330116), (130, 165058), (260, 82529)]