19738556

素因数分解:

$2^2\times {\mathrm{131}}^1\times {\mathrm{139}}^1\times {\mathrm{271}}^1$

素因数の和:545

約数の個数: 24

約数和(自身を含む): 35185920

約数和(自身を除く): 15447364

約数列:

[1, 2, 4, 131, 139, 262, 271, 278, 524, 542, 556, 1084, 18209, 35501, 36418, 37669, 71002, 72836, 75338, 142004, 150676, 4934639, 9869278, 19738556]

約数ペア:

[(1, 19738556), (2, 9869278), (4, 4934639), (131, 150676), (139, 142004), (262, 75338), (271, 72836), (278, 71002), (524, 37669), (542, 36418), (556, 35501), (1084, 18209)]