21689780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{154927}}^1$

素因数の和:154943

約数の個数: 24

約数和(自身を含む): 52055808

約数和(自身を除く): 30366028

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 154927, 309854, 619708, 774635, 1084489, 1549270, 2168978, 3098540, 4337956, 5422445, 10844890, 21689780]

約数ペア:

[(1, 21689780), (2, 10844890), (4, 5422445), (5, 4337956), (7, 3098540), (10, 2168978), (14, 1549270), (20, 1084489), (28, 774635), (35, 619708), (70, 309854), (140, 154927)]