21450820

素因数分解:

$2^2\times 5^1\times {\mathrm{433}}^1\times {\mathrm{2477}}^1$

素因数の和:2919

約数の個数: 24

約数和(自身を含む): 45168984

約数和(自身を除く): 23718164

約数列:

[1, 2, 4, 5, 10, 20, 433, 866, 1732, 2165, 2477, 4330, 4954, 8660, 9908, 12385, 24770, 49540, 1072541, 2145082, 4290164, 5362705, 10725410, 21450820]

約数ペア:

[(1, 21450820), (2, 10725410), (4, 5362705), (5, 4290164), (10, 2145082), (20, 1072541), (433, 49540), (866, 24770), (1732, 12385), (2165, 9908), (2477, 8660), (4330, 4954)]