21028385

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19381}}^1$

素因数の和:19424

約数の個数: 16

約数和(自身を含む): 29770752

約数和(自身を除く): 8742367

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 19381, 96905, 135667, 600811, 678335, 3004055, 4205677, 21028385]

約数ペア:

[(1, 21028385), (5, 4205677), (7, 3004055), (31, 678335), (35, 600811), (155, 135667), (217, 96905), (1085, 19381)]