21393639

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13901}}^1$

素因数の和:13932

約数の個数: 20

約数和(自身を含む): 33642840

約数和(自身を除く): 12249201

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13901, 41703, 125109, 264119, 375327, 792357, 1125981, 2377071, 7131213, 21393639]

約数ペア:

[(1, 21393639), (3, 7131213), (9, 2377071), (19, 1125981), (27, 792357), (57, 375327), (81, 264119), (171, 125109), (513, 41703), (1539, 13901)]