21665111

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1\times {\mathrm{367}}^1$

素因数の和:638

約数の個数: 16

約数和(自身を含む): 24729600

約数和(自身を除く): 3064489

約数列:

[1, 13, 19, 239, 247, 367, 3107, 4541, 4771, 6973, 59033, 87713, 90649, 1140269, 1666547, 21665111]

約数ペア:

[(1, 21665111), (13, 1666547), (19, 1140269), (239, 90649), (247, 87713), (367, 59033), (3107, 6973), (4541, 4771)]