21234878

素因数分解:

$2^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{9661}}^1$

素因数の和:9827

約数の個数: 16

約数和(自身を含む): 36638304

約数和(自身を除く): 15403426

約数列:

[1, 2, 7, 14, 157, 314, 1099, 2198, 9661, 19322, 67627, 135254, 1516777, 3033554, 10617439, 21234878]

約数ペア:

[(1, 21234878), (2, 10617439), (7, 3033554), (14, 1516777), (157, 135254), (314, 67627), (1099, 19322), (2198, 9661)]