20991642

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{499801}}^1$

素因数の和:499813

約数の個数: 16

約数和(自身を含む): 47980992

約数和(自身を除く): 26989350

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 499801, 999602, 1499403, 2998806, 3498607, 6997214, 10495821, 20991642]

約数ペア:

[(1, 20991642), (2, 10495821), (3, 6997214), (6, 3498607), (7, 2998806), (14, 1499403), (21, 999602), (42, 499801)]