205327720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{394861}}^1$

素因数の和:394885

約数の個数: 32

約数和(自身を含む): 497526120

約数和(自身を除く): 292198400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 394861, 789722, 1579444, 1974305, 3158888, 3948610, 5133193, 7897220, 10266386, 15794440, 20532772, 25665965, 41065544, 51331930, 102663860, 205327720]

約数ペア:

[(1, 205327720), (2, 102663860), (4, 51331930), (5, 41065544), (8, 25665965), (10, 20532772), (13, 15794440), (20, 10266386), (26, 7897220), (40, 5133193), (52, 3948610), (65, 3158888), (104, 1974305), (130, 1579444), (260, 789722), (520, 394861)]