645136

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{661}}^1$

素因数の和:730

約数の個数: 20

約数和(自身を含む): 1272364

約数和(自身を除く): 627228

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 661, 976, 1322, 2644, 5288, 10576, 40321, 80642, 161284, 322568, 645136]

約数ペア:

[(1, 645136), (2, 322568), (4, 161284), (8, 80642), (16, 40321), (61, 10576), (122, 5288), (244, 2644), (488, 1322), (661, 976)]