19782940

素因数分解:

$2^2\times 5^1\times {\mathrm{449}}^1\times {\mathrm{2203}}^1$

素因数の和:2661

約数の個数: 24

約数和(自身を含む): 41655600

約数和(自身を除く): 21872660

約数列:

[1, 2, 4, 5, 10, 20, 449, 898, 1796, 2203, 2245, 4406, 4490, 8812, 8980, 11015, 22030, 44060, 989147, 1978294, 3956588, 4945735, 9891470, 19782940]

約数ペア:

[(1, 19782940), (2, 9891470), (4, 4945735), (5, 3956588), (10, 1978294), (20, 989147), (449, 44060), (898, 22030), (1796, 11015), (2203, 8980), (2245, 8812), (4406, 4490)]