640051775

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{479}}^1$

素因数の和:656

約数の個数: 48

約数和(自身を含む): 895656960

約数和(自身を除く): 255605185

約数列:

[1, 5, 11, 25, 43, 55, 113, 215, 275, 473, 479, 565, 1075, 1243, 2365, 2395, 2825, 4859, 5269, 6215, 11825, 11975, 20597, 24295, 26345, 31075, 53449, 54127, 102985, 121475, 131725, 226567, 267245, 270635, 514925, 595397, 1132835, 1336225, 1353175, 2327461, 2976985, 5664175, 11637305, 14884925, 25602071, 58186525, 128010355, 640051775]

約数ペア:

[(1, 640051775), (5, 128010355), (11, 58186525), (25, 25602071), (43, 14884925), (55, 11637305), (113, 5664175), (215, 2976985), (275, 2327461), (473, 1353175), (479, 1336225), (565, 1132835), (1075, 595397), (1243, 514925), (2365, 270635), (2395, 267245), (2825, 226567), (4859, 131725), (5269, 121475), (6215, 102985), (11825, 54127), (11975, 53449), (20597, 31075), (24295, 26345)]