19780005

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{733}}^1$

素因数の和:1005

約数の個数: 32

約数和(自身を含む): 36359424

約数和(自身を除く): 16579419

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 257, 733, 771, 1285, 1799, 2199, 3665, 3855, 5131, 5397, 8995, 10995, 15393, 25655, 26985, 76965, 188381, 565143, 941905, 1318667, 2825715, 3956001, 6593335, 19780005]

約数ペア:

[(1, 19780005), (3, 6593335), (5, 3956001), (7, 2825715), (15, 1318667), (21, 941905), (35, 565143), (105, 188381), (257, 76965), (733, 26985), (771, 25655), (1285, 15393), (1799, 10995), (2199, 8995), (3665, 5397), (3855, 5131)]