21075129

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{49823}}^1$

素因数の和:49876

約数の個数: 12

約数和(自身を含む): 31090176

約数和(自身を除く): 10015047

約数列:

[1, 3, 9, 47, 141, 423, 49823, 149469, 448407, 2341681, 7025043, 21075129]

約数ペア:

[(1, 21075129), (3, 7025043), (9, 2341681), (47, 448407), (141, 149469), (423, 49823)]