20921558

素因数分解:

$2^1\times 7^1\times {\mathrm{379}}^1\times {\mathrm{3943}}^1$

素因数の和:4331

約数の個数: 16

約数和(自身を含む): 35969280

約数和(自身を除く): 15047722

約数列:

[1, 2, 7, 14, 379, 758, 2653, 3943, 5306, 7886, 27601, 55202, 1494397, 2988794, 10460779, 20921558]

約数ペア:

[(1, 20921558), (2, 10460779), (7, 2988794), (14, 1494397), (379, 55202), (758, 27601), (2653, 7886), (3943, 5306)]