19815290

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{499}}^1$

素因数の和:555

約数の個数: 48

約数和(自身を含む): 41148000

約数和(自身を除く): 21332710

約数列:

[1, 2, 5, 10, 11, 19, 22, 38, 55, 95, 110, 190, 209, 361, 418, 499, 722, 998, 1045, 1805, 2090, 2495, 3610, 3971, 4990, 5489, 7942, 9481, 10978, 18962, 19855, 27445, 39710, 47405, 54890, 94810, 104291, 180139, 208582, 360278, 521455, 900695, 1042910, 1801390, 1981529, 3963058, 9907645, 19815290]

約数ペア:

[(1, 19815290), (2, 9907645), (5, 3963058), (10, 1981529), (11, 1801390), (19, 1042910), (22, 900695), (38, 521455), (55, 360278), (95, 208582), (110, 180139), (190, 104291), (209, 94810), (361, 54890), (418, 47405), (499, 39710), (722, 27445), (998, 19855), (1045, 18962), (1805, 10978), (2090, 9481), (2495, 7942), (3610, 5489), (3971, 4990)]