21033957

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1\times {\mathrm{211}}^1$

素因数の和:369

約数の個数: 32

約数和(自身を含む): 33214464

約数和(自身を除く): 12180507

約数列:

[1, 3, 7, 21, 47, 101, 141, 211, 303, 329, 633, 707, 987, 1477, 2121, 4431, 4747, 9917, 14241, 21311, 29751, 33229, 63933, 69419, 99687, 149177, 208257, 447531, 1001617, 3004851, 7011319, 21033957]

約数ペア:

[(1, 21033957), (3, 7011319), (7, 3004851), (21, 1001617), (47, 447531), (101, 208257), (141, 149177), (211, 99687), (303, 69419), (329, 63933), (633, 33229), (707, 29751), (987, 21311), (1477, 14241), (2121, 9917), (4431, 4747)]