4986980

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{641}}^1$

素因数の和:1039

約数の個数: 24

約数和(自身を含む): 10515960

約数和(自身を除く): 5528980

約数列:

[1, 2, 4, 5, 10, 20, 389, 641, 778, 1282, 1556, 1945, 2564, 3205, 3890, 6410, 7780, 12820, 249349, 498698, 997396, 1246745, 2493490, 4986980]

約数ペア:

[(1, 4986980), (2, 2493490), (4, 1246745), (5, 997396), (10, 498698), (20, 249349), (389, 12820), (641, 7780), (778, 6410), (1282, 3890), (1556, 3205), (1945, 2564)]