21278943

素因数分解:

$3^4\times 7^1\times {\mathrm{37529}}^1$

素因数の和:37548

約数の個数: 20

約数和(自身を含む): 36329040

約数和(自身を除く): 15050097

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37529, 112587, 262703, 337761, 788109, 1013283, 2364327, 3039849, 7092981, 21278943]

約数ペア:

[(1, 21278943), (3, 7092981), (7, 3039849), (9, 2364327), (21, 1013283), (27, 788109), (63, 337761), (81, 262703), (189, 112587), (567, 37529)]