21395387

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{47}}^1\times {\mathrm{97}}^1$

素因数の和:195

約数の個数: 24

約数和(自身を含む): 25091136

約数和(自身を除く): 3695749

約数列:

[1, 13, 19, 47, 97, 247, 361, 611, 893, 1261, 1843, 4559, 4693, 11609, 16967, 23959, 35017, 59267, 86621, 220571, 455221, 1126073, 1645799, 21395387]

約数ペア:

[(1, 21395387), (13, 1645799), (19, 1126073), (47, 455221), (97, 220571), (247, 86621), (361, 59267), (611, 35017), (893, 23959), (1261, 16967), (1843, 11609), (4559, 4693)]