20859730

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{349}}^1$

素因数の和:538

約数の個数: 32

約数和(自身を含む): 38808000

約数和(自身を除く): 17948270

約数列:

[1, 2, 5, 10, 43, 86, 139, 215, 278, 349, 430, 695, 698, 1390, 1745, 3490, 5977, 11954, 15007, 29885, 30014, 48511, 59770, 75035, 97022, 150070, 242555, 485110, 2085973, 4171946, 10429865, 20859730]

約数ペア:

[(1, 20859730), (2, 10429865), (5, 4171946), (10, 2085973), (43, 485110), (86, 242555), (139, 150070), (215, 97022), (278, 75035), (349, 59770), (430, 48511), (695, 30014), (698, 29885), (1390, 15007), (1745, 11954), (3490, 5977)]