21517899

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:515

約数の個数: 32

約数和(自身を含む): 33062400

約数和(自身を除く): 11544501

約数列:

[1, 3, 13, 19, 39, 57, 71, 213, 247, 409, 741, 923, 1227, 1349, 2769, 4047, 5317, 7771, 15951, 17537, 23313, 29039, 52611, 87117, 101023, 303069, 377507, 551741, 1132521, 1655223, 7172633, 21517899]

約数ペア:

[(1, 21517899), (3, 7172633), (13, 1655223), (19, 1132521), (39, 551741), (57, 377507), (71, 303069), (213, 101023), (247, 87117), (409, 52611), (741, 29039), (923, 23313), (1227, 17537), (1349, 15951), (2769, 7771), (4047, 5317)]