21389288

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{1291}}^1$

素因数の和:1425

約数の個数: 32

約数和(自身を含む): 42636000

約数和(自身を除く): 21246712

約数列:

[1, 2, 4, 8, 19, 38, 76, 109, 152, 218, 436, 872, 1291, 2071, 2582, 4142, 5164, 8284, 10328, 16568, 24529, 49058, 98116, 140719, 196232, 281438, 562876, 1125752, 2673661, 5347322, 10694644, 21389288]

約数ペア:

[(1, 21389288), (2, 10694644), (4, 5347322), (8, 2673661), (19, 1125752), (38, 562876), (76, 281438), (109, 196232), (152, 140719), (218, 98116), (436, 49058), (872, 24529), (1291, 16568), (2071, 10328), (2582, 8284), (4142, 5164)]