21164805

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{10007}}^1$

素因数の和:10065

約数の個数: 24

約数和(自身を含む): 37469952

約数和(自身を除く): 16305147

約数列:

[1, 3, 5, 9, 15, 45, 47, 141, 235, 423, 705, 2115, 10007, 30021, 50035, 90063, 150105, 450315, 470329, 1410987, 2351645, 4232961, 7054935, 21164805]

約数ペア:

[(1, 21164805), (3, 7054935), (5, 4232961), (9, 2351645), (15, 1410987), (45, 470329), (47, 450315), (141, 150105), (235, 90063), (423, 50035), (705, 30021), (2115, 10007)]