21890679

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{41}}^1$

素因数の和:128

約数の個数: 48

約数和(自身を含む): 34564320

約数和(自身を除く): 12673641

約数列:

[1, 3, 17, 19, 29, 41, 51, 57, 87, 123, 323, 361, 493, 551, 697, 779, 969, 1083, 1189, 1479, 1653, 2091, 2337, 3567, 6137, 9367, 10469, 13243, 14801, 18411, 20213, 22591, 28101, 31407, 39729, 44403, 60639, 67773, 177973, 251617, 384047, 429229, 533919, 754851, 1152141, 1287687, 7296893, 21890679]

約数ペア:

[(1, 21890679), (3, 7296893), (17, 1287687), (19, 1152141), (29, 754851), (41, 533919), (51, 429229), (57, 384047), (87, 251617), (123, 177973), (323, 67773), (361, 60639), (493, 44403), (551, 39729), (697, 31407), (779, 28101), (969, 22591), (1083, 20213), (1189, 18411), (1479, 14801), (1653, 13243), (2091, 10469), (2337, 9367), (3567, 6137)]