21278873

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{2683}}^1$

素因数の和:2804

約数の個数: 16

約数和(自身を含む): 26797056

約数和(自身を除く): 5518183

約数列:

[1, 7, 11, 77, 103, 721, 1133, 2683, 7931, 18781, 29513, 206591, 276349, 1934443, 3039839, 21278873]

約数ペア:

[(1, 21278873), (7, 3039839), (11, 1934443), (77, 276349), (103, 206591), (721, 29513), (1133, 18781), (2683, 7931)]