261567490

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{389}}^1\times {\mathrm{3539}}^1$

素因数の和:3954

約数の個数: 32

約数和(自身を含む): 497016000

約数和(自身を除く): 235448510

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 389, 778, 1945, 3539, 3890, 7078, 7391, 14782, 17695, 35390, 36955, 67241, 73910, 134482, 336205, 672410, 1376671, 2753342, 6883355, 13766710, 26156749, 52313498, 130783745, 261567490]

約数ペア:

[(1, 261567490), (2, 130783745), (5, 52313498), (10, 26156749), (19, 13766710), (38, 6883355), (95, 2753342), (190, 1376671), (389, 672410), (778, 336205), (1945, 134482), (3539, 73910), (3890, 67241), (7078, 36955), (7391, 35390), (14782, 17695)]