19877221

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{9497}}^1$

素因数の和:9540

約数の個数: 16

約数和(自身を含む): 25530624

約数和(自身を除く): 5653403

約数列:

[1, 7, 13, 23, 91, 161, 299, 2093, 9497, 66479, 123461, 218431, 864227, 1529017, 2839603, 19877221]

約数ペア:

[(1, 19877221), (7, 2839603), (13, 1529017), (23, 864227), (91, 218431), (161, 123461), (299, 66479), (2093, 9497)]