21551420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97961}}^1$

素因数の和:97981

約数の個数: 24

約数和(自身を含む): 49372848

約数和(自身を除く): 27821428

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 97961, 195922, 391844, 489805, 979610, 1077571, 1959220, 2155142, 4310284, 5387855, 10775710, 21551420]

約数ペア:

[(1, 21551420), (2, 10775710), (4, 5387855), (5, 4310284), (10, 2155142), (11, 1959220), (20, 1077571), (22, 979610), (44, 489805), (55, 391844), (110, 195922), (220, 97961)]