18739985

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{227}}^1$

素因数の和:341

約数の個数: 32

約数和(自身を含む): 26265600

約数和(自身を除く): 7525615

約数列:

[1, 5, 11, 19, 55, 79, 95, 209, 227, 395, 869, 1045, 1135, 1501, 2497, 4313, 4345, 7505, 12485, 16511, 17933, 21565, 47443, 82555, 89665, 197263, 237215, 340727, 986315, 1703635, 3747997, 18739985]

約数ペア:

[(1, 18739985), (5, 3747997), (11, 1703635), (19, 986315), (55, 340727), (79, 237215), (95, 197263), (209, 89665), (227, 82555), (395, 47443), (869, 21565), (1045, 17933), (1135, 16511), (1501, 12485), (2497, 7505), (4313, 4345)]