20389869

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1$

素因数の和:174

約数の個数: 48

約数和(自身を含む): 32947200

約数和(自身を除く): 12557331

約数列:

[1, 3, 9, 19, 43, 47, 57, 59, 129, 141, 171, 177, 387, 423, 531, 817, 893, 1121, 2021, 2451, 2537, 2679, 2773, 3363, 6063, 7353, 7611, 8037, 8319, 10089, 18189, 22833, 24957, 38399, 48203, 52687, 115197, 119239, 144609, 158061, 345591, 357717, 433827, 474183, 1073151, 2265541, 6796623, 20389869]

約数ペア:

[(1, 20389869), (3, 6796623), (9, 2265541), (19, 1073151), (43, 474183), (47, 433827), (57, 357717), (59, 345591), (129, 158061), (141, 144609), (171, 119239), (177, 115197), (387, 52687), (423, 48203), (531, 38399), (817, 24957), (893, 22833), (1121, 18189), (2021, 10089), (2451, 8319), (2537, 8037), (2679, 7611), (2773, 7353), (3363, 6063)]