21871995

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{39409}}^1$

素因数の和:39454

約数の個数: 16

約数和(自身を含む): 35941920

約数和(自身を除く): 14069925

約数列:

[1, 3, 5, 15, 37, 111, 185, 555, 39409, 118227, 197045, 591135, 1458133, 4374399, 7290665, 21871995]

約数ペア:

[(1, 21871995), (3, 7290665), (5, 4374399), (15, 1458133), (37, 591135), (111, 197045), (185, 118227), (555, 39409)]