80821420

素因数分解:

$2^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{11579}}^1$

素因数の和:11937

約数の個数: 24

約数和(自身を含む): 170226000

約数和(自身を除く): 89404580

約数列:

[1, 2, 4, 5, 10, 20, 349, 698, 1396, 1745, 3490, 6980, 11579, 23158, 46316, 57895, 115790, 231580, 4041071, 8082142, 16164284, 20205355, 40410710, 80821420]

約数ペア:

[(1, 80821420), (2, 40410710), (4, 20205355), (5, 16164284), (10, 8082142), (20, 4041071), (349, 231580), (698, 115790), (1396, 57895), (1745, 46316), (3490, 23158), (6980, 11579)]