21405486

素因数分解:

$2^1\times 3^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{509}}^1$

素因数の和:720

約数の個数: 32

約数和(自身を含む): 44161920

約数和(自身を除く): 22756434

約数列:

[1, 2, 3, 6, 43, 86, 129, 163, 258, 326, 489, 509, 978, 1018, 1527, 3054, 7009, 14018, 21027, 21887, 42054, 43774, 65661, 82967, 131322, 165934, 248901, 497802, 3567581, 7135162, 10702743, 21405486]

約数ペア:

[(1, 21405486), (2, 10702743), (3, 7135162), (6, 3567581), (43, 497802), (86, 248901), (129, 165934), (163, 131322), (258, 82967), (326, 65661), (489, 43774), (509, 42054), (978, 21887), (1018, 21027), (1527, 14018), (3054, 7009)]