21041540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80929}}^1$

素因数の和:80951

約数の個数: 24

約数和(自身を含む): 47586840

約数和(自身を除く): 26545300

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80929, 161858, 323716, 404645, 809290, 1052077, 1618580, 2104154, 4208308, 5260385, 10520770, 21041540]

約数ペア:

[(1, 21041540), (2, 10520770), (4, 5260385), (5, 4208308), (10, 2104154), (13, 1618580), (20, 1052077), (26, 809290), (52, 404645), (65, 323716), (130, 161858), (260, 80929)]