643312

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{1297}}^1$

素因数の和:1336

約数の個数: 20

約数和(自身を含む): 1287616

約数和(自身を除く): 644304

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 1297, 2594, 5188, 10376, 20752, 40207, 80414, 160828, 321656, 643312]

約数ペア:

[(1, 643312), (2, 321656), (4, 160828), (8, 80414), (16, 40207), (31, 20752), (62, 10376), (124, 5188), (248, 2594), (496, 1297)]