19810659

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{607}}^1$

素因数の和:687

約数の個数: 32

約数和(自身を含む): 30818304

約数和(自身を除く): 11007645

約数列:

[1, 3, 11, 23, 33, 43, 69, 129, 253, 473, 607, 759, 989, 1419, 1821, 2967, 6677, 10879, 13961, 20031, 26101, 32637, 41883, 78303, 153571, 287111, 460713, 600323, 861333, 1800969, 6603553, 19810659]

約数ペア:

[(1, 19810659), (3, 6603553), (11, 1800969), (23, 861333), (33, 600323), (43, 460713), (69, 287111), (129, 153571), (253, 78303), (473, 41883), (607, 32637), (759, 26101), (989, 20031), (1419, 13961), (1821, 10879), (2967, 6677)]