20828740

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61261}}^1$

素因数の和:61287

約数の個数: 24

約数和(自身を含む): 46314072

約数和(自身を除く): 25485332

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61261, 122522, 245044, 306305, 612610, 1041437, 1225220, 2082874, 4165748, 5207185, 10414370, 20828740]

約数ペア:

[(1, 20828740), (2, 10414370), (4, 5207185), (5, 4165748), (10, 2082874), (17, 1225220), (20, 1041437), (34, 612610), (68, 306305), (85, 245044), (170, 122522), (340, 61261)]