21661040

素因数分解:

$2^4\times 5^1\times {\mathrm{270763}}^1$

素因数の和:270776

約数の個数: 20

約数和(自身を含む): 50362104

約数和(自身を除く): 28701064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270763, 541526, 1083052, 1353815, 2166104, 2707630, 4332208, 5415260, 10830520, 21661040]

約数ペア:

[(1, 21661040), (2, 10830520), (4, 5415260), (5, 4332208), (8, 2707630), (10, 2166104), (16, 1353815), (20, 1083052), (40, 541526), (80, 270763)]