21221949

素因数分解:

$3^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{4657}}^1$

素因数の和:4705

約数の個数: 24

約数和(自身を含む): 33984768

約数和(自身を除く): 12762819

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 651, 1519, 4557, 4657, 13971, 32599, 97797, 144367, 228193, 433101, 684579, 1010569, 3031707, 7073983, 21221949]

約数ペア:

[(1, 21221949), (3, 7073983), (7, 3031707), (21, 1010569), (31, 684579), (49, 433101), (93, 228193), (147, 144367), (217, 97797), (651, 32599), (1519, 13971), (4557, 4657)]