638554709

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{79}}^1\times {\mathrm{647}}^1$

素因数の和:801

約数の個数: 24

約数和(自身を含む): 720679680

約数和(自身を除く): 82124971

約数列:

[1, 13, 31, 79, 403, 647, 961, 1027, 2449, 8411, 12493, 20057, 31837, 51113, 75919, 260741, 621767, 664469, 986947, 1584503, 8082971, 20598539, 49119593, 638554709]

約数ペア:

[(1, 638554709), (13, 49119593), (31, 20598539), (79, 8082971), (403, 1584503), (647, 986947), (961, 664469), (1027, 621767), (2449, 260741), (8411, 75919), (12493, 51113), (20057, 31837)]