20639691

素因数分解:

$3^5\times {\mathrm{157}}^1\times {\mathrm{541}}^1$

素因数の和:713

約数の個数: 24

約数和(自身を含む): 31171504

約数和(自身を除く): 10531813

約数列:

[1, 3, 9, 27, 81, 157, 243, 471, 541, 1413, 1623, 4239, 4869, 12717, 14607, 38151, 43821, 84937, 131463, 254811, 764433, 2293299, 6879897, 20639691]

約数ペア:

[(1, 20639691), (3, 6879897), (9, 2293299), (27, 764433), (81, 254811), (157, 131463), (243, 84937), (471, 43821), (541, 38151), (1413, 14607), (1623, 12717), (4239, 4869)]