21391818

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{509329}}^1$

素因数の和:509341

約数の個数: 16

約数和(自身を含む): 48895680

約数和(自身を除く): 27503862

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 509329, 1018658, 1527987, 3055974, 3565303, 7130606, 10695909, 21391818]

約数ペア:

[(1, 21391818), (2, 10695909), (3, 7130606), (6, 3565303), (7, 3055974), (14, 1527987), (21, 1018658), (42, 509329)]