21382809

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53591}}^1$

素因数の和:53620

約数の個数: 16

約数和(自身を含む): 34298880

約数和(自身を除く): 12916071

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53591, 160773, 375137, 1018229, 1125411, 3054687, 7127603, 21382809]

約数ペア:

[(1, 21382809), (3, 7127603), (7, 3054687), (19, 1125411), (21, 1018229), (57, 375137), (133, 160773), (399, 53591)]