12921321

素因数分解:

$3^1\times 7^1\times {\mathrm{521}}^1\times {\mathrm{1181}}^1$

素因数の和:1712

約数の個数: 16

約数和(自身を含む): 19744128

約数和(自身を除く): 6822807

約数列:

[1, 3, 7, 21, 521, 1181, 1563, 3543, 3647, 8267, 10941, 24801, 615301, 1845903, 4307107, 12921321]

約数ペア:

[(1, 12921321), (3, 4307107), (7, 1845903), (21, 615301), (521, 24801), (1181, 10941), (1563, 8267), (3543, 3647)]