261736784

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{398989}}^1$

素因数の和:399038

約数の個数: 20

約数和(自身を含む): 519484980

約数和(自身を除く): 257748196

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 398989, 797978, 1595956, 3191912, 6383824, 16358549, 32717098, 65434196, 130868392, 261736784]

約数ペア:

[(1, 261736784), (2, 130868392), (4, 65434196), (8, 32717098), (16, 16358549), (41, 6383824), (82, 3191912), (164, 1595956), (328, 797978), (656, 398989)]