21778769

素因数分解:

${\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:165

約数の個数: 24

約数和(自身を含む): 24944832

約数和(自身を除く): 3166063

約数列:

[1, 19, 23, 43, 61, 361, 437, 817, 989, 1159, 1403, 2623, 8303, 15523, 18791, 22021, 26657, 49837, 60329, 357029, 506483, 946903, 1146251, 21778769]

約数ペア:

[(1, 21778769), (19, 1146251), (23, 946903), (43, 506483), (61, 357029), (361, 60329), (437, 49837), (817, 26657), (989, 22021), (1159, 18791), (1403, 15523), (2623, 8303)]