21793940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155671}}^1$

素因数の和:155687

約数の個数: 24

約数和(自身を含む): 52305792

約数和(自身を除く): 30511852

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155671, 311342, 622684, 778355, 1089697, 1556710, 2179394, 3113420, 4358788, 5448485, 10896970, 21793940]

約数ペア:

[(1, 21793940), (2, 10896970), (4, 5448485), (5, 4358788), (7, 3113420), (10, 2179394), (14, 1556710), (20, 1089697), (28, 778355), (35, 622684), (70, 311342), (140, 155671)]