20724952005

素因数分解:

$3^4\times 5^1\times {\mathrm{51172721}}^1$

素因数の和:51172738

約数の個数: 20

約数和(自身を含む): 37151396172

約数和(自身を除く): 16426444167

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51172721, 153518163, 255863605, 460554489, 767590815, 1381663467, 2302772445, 4144990401, 6908317335, 20724952005]

約数ペア:

[(1, 20724952005), (3, 6908317335), (5, 4144990401), (9, 2302772445), (15, 1381663467), (27, 767590815), (45, 460554489), (81, 255863605), (135, 153518163), (405, 51172721)]