21201183

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{5569}}^1$

素因数の和:5628

約数の個数: 20

約数和(自身を含む): 32350560

約数和(自身を除く): 11149377

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 1269, 3807, 5569, 16707, 50121, 150363, 261743, 451089, 785229, 2355687, 7067061, 21201183]

約数ペア:

[(1, 21201183), (3, 7067061), (9, 2355687), (27, 785229), (47, 451089), (81, 261743), (141, 150363), (423, 50121), (1269, 16707), (3807, 5569)]