21150987

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1049}}^1$

素因数の和:1123

約数の個数: 32

約数和(自身を含む): 33868800

約数和(自身を除く): 12717813

約数列:

[1, 3, 11, 13, 33, 39, 47, 141, 143, 429, 517, 611, 1049, 1551, 1833, 3147, 6721, 11539, 13637, 20163, 34617, 40911, 49303, 147909, 150007, 450021, 542333, 640939, 1626999, 1922817, 7050329, 21150987]

約数ペア:

[(1, 21150987), (3, 7050329), (11, 1922817), (13, 1626999), (33, 640939), (39, 542333), (47, 450021), (141, 150007), (143, 147909), (429, 49303), (517, 40911), (611, 34617), (1049, 20163), (1551, 13637), (1833, 11539), (3147, 6721)]