21309328

素因数分解:

$2^4\times {\mathrm{1019}}^1\times {\mathrm{1307}}^1$

素因数の和:2334

約数の個数: 20

約数和(自身を含む): 41358960

約数和(自身を除く): 20049632

約数列:

[1, 2, 4, 8, 16, 1019, 1307, 2038, 2614, 4076, 5228, 8152, 10456, 16304, 20912, 1331833, 2663666, 5327332, 10654664, 21309328]

約数ペア:

[(1, 21309328), (2, 10654664), (4, 5327332), (8, 2663666), (16, 1331833), (1019, 20912), (1307, 16304), (2038, 10456), (2614, 8152), (4076, 5228)]