21449615

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{571}}^1\times {\mathrm{683}}^1$

素因数の和:1270

約数の個数: 16

約数和(自身を含む): 28169856

約数和(自身を除く): 6720241

約数列:

[1, 5, 11, 55, 571, 683, 2855, 3415, 6281, 7513, 31405, 37565, 389993, 1949965, 4289923, 21449615]

約数ペア:

[(1, 21449615), (5, 4289923), (11, 1949965), (55, 389993), (571, 37565), (683, 31405), (2855, 7513), (3415, 6281)]