644956

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:253

約数の個数: 24

約数和(自身を含む): 1238720

約数和(自身を除く): 593764

約数列:

[1, 2, 4, 13, 26, 52, 79, 157, 158, 314, 316, 628, 1027, 2041, 2054, 4082, 4108, 8164, 12403, 24806, 49612, 161239, 322478, 644956]

約数ペア:

[(1, 644956), (2, 322478), (4, 161239), (13, 49612), (26, 24806), (52, 12403), (79, 8164), (157, 4108), (158, 4082), (314, 2054), (316, 2041), (628, 1027)]