21787220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11971}}^1$

素因数の和:12000

約数の個数: 48

約数和(自身を含む): 56316288

約数和(自身を除く): 34529068

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11971, 23942, 47884, 59855, 83797, 119710, 155623, 167594, 239420, 311246, 335188, 418985, 622492, 778115, 837970, 1089361, 1556230, 1675940, 2178722, 3112460, 4357444, 5446805, 10893610, 21787220]

約数ペア:

[(1, 21787220), (2, 10893610), (4, 5446805), (5, 4357444), (7, 3112460), (10, 2178722), (13, 1675940), (14, 1556230), (20, 1089361), (26, 837970), (28, 778115), (35, 622492), (52, 418985), (65, 335188), (70, 311246), (91, 239420), (130, 167594), (140, 155623), (182, 119710), (260, 83797), (364, 59855), (455, 47884), (910, 23942), (1820, 11971)]