19999408

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{8741}}^1$

素因数の和:8773

約数の個数: 40

約数和(自身を含む): 45528336

約数和(自身を除く): 25528928

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 44, 52, 88, 104, 143, 176, 208, 286, 572, 1144, 2288, 8741, 17482, 34964, 69928, 96151, 113633, 139856, 192302, 227266, 384604, 454532, 769208, 909064, 1249963, 1538416, 1818128, 2499926, 4999852, 9999704, 19999408]

約数ペア:

[(1, 19999408), (2, 9999704), (4, 4999852), (8, 2499926), (11, 1818128), (13, 1538416), (16, 1249963), (22, 909064), (26, 769208), (44, 454532), (52, 384604), (88, 227266), (104, 192302), (143, 139856), (176, 113633), (208, 96151), (286, 69928), (572, 34964), (1144, 17482), (2288, 8741)]