21696745

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19997}}^1$

素因数の和:20040

約数の個数: 16

約数和(自身を含む): 30716928

約数和(自身を除く): 9020183

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 19997, 99985, 139979, 619907, 699895, 3099535, 4339349, 21696745]

約数ペア:

[(1, 21696745), (5, 4339349), (7, 3099535), (31, 699895), (35, 619907), (155, 139979), (217, 99985), (1085, 19997)]