12781840

素因数分解:

$2^4\times 5^1\times {\mathrm{159773}}^1$

素因数の和:159786

約数の個数: 20

約数和(自身を含む): 29717964

約数和(自身を除く): 16936124

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 159773, 319546, 639092, 798865, 1278184, 1597730, 2556368, 3195460, 6390920, 12781840]

約数ペア:

[(1, 12781840), (2, 6390920), (4, 3195460), (5, 2556368), (8, 1597730), (10, 1278184), (16, 798865), (20, 639092), (40, 319546), (80, 159773)]