21637040

素因数分解:

$2^4\times 5^1\times {\mathrm{270463}}^1$

素因数の和:270476

約数の個数: 20

約数和(自身を含む): 50306304

約数和(自身を除く): 28669264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270463, 540926, 1081852, 1352315, 2163704, 2704630, 4327408, 5409260, 10818520, 21637040]

約数ペア:

[(1, 21637040), (2, 10818520), (4, 5409260), (5, 4327408), (8, 2704630), (10, 2163704), (16, 1352315), (20, 1081852), (40, 540926), (80, 270463)]