21057706540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4764187}}^1$

素因数の和:4764226

約数の個数: 48

約数和(自身を含む): 50424165792

約数和(自身を除く): 29366459252

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4764187, 9528374, 19056748, 23820935, 47641870, 61934431, 80991179, 95283740, 123868862, 161982358, 247737724, 309672155, 323964716, 404955895, 619344310, 809911790, 1052885327, 1238688620, 1619823580, 2105770654, 4211541308, 5264426635, 10528853270, 21057706540]

約数ペア:

[(1, 21057706540), (2, 10528853270), (4, 5264426635), (5, 4211541308), (10, 2105770654), (13, 1619823580), (17, 1238688620), (20, 1052885327), (26, 809911790), (34, 619344310), (52, 404955895), (65, 323964716), (68, 309672155), (85, 247737724), (130, 161982358), (170, 123868862), (221, 95283740), (260, 80991179), (340, 61934431), (442, 47641870), (884, 23820935), (1105, 19056748), (2210, 9528374), (4420, 4764187)]