680980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{431}}^1$

素因数の和:519

約数の個数: 24

約数和(自身を含む): 1451520

約数和(自身を除く): 770540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 431, 790, 862, 1580, 1724, 2155, 4310, 8620, 34049, 68098, 136196, 170245, 340490, 680980]

約数ペア:

[(1, 680980), (2, 340490), (4, 170245), (5, 136196), (10, 68098), (20, 34049), (79, 8620), (158, 4310), (316, 2155), (395, 1724), (431, 1580), (790, 862)]