21815318

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{1291}}^1$

素因数の和:1388

約数の個数: 32

約数和(自身を含む): 40186368

約数和(自身を除く): 18371050

約数列:

[1, 2, 7, 14, 17, 34, 71, 119, 142, 238, 497, 994, 1207, 1291, 2414, 2582, 8449, 9037, 16898, 18074, 21947, 43894, 91661, 153629, 183322, 307258, 641627, 1283254, 1558237, 3116474, 10907659, 21815318]

約数ペア:

[(1, 21815318), (2, 10907659), (7, 3116474), (14, 1558237), (17, 1283254), (34, 641627), (71, 307258), (119, 183322), (142, 153629), (238, 91661), (497, 43894), (994, 21947), (1207, 18074), (1291, 16898), (2414, 9037), (2582, 8449)]