20640942

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1531}}^1$

素因数の和:1653

約数の個数: 48

約数和(自身を含む): 51622272

約数和(自身を除く): 30981330

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 107, 126, 214, 321, 642, 749, 963, 1498, 1531, 1926, 2247, 3062, 4494, 4593, 6741, 9186, 10717, 13482, 13779, 21434, 27558, 32151, 64302, 96453, 163817, 192906, 327634, 491451, 982902, 1146719, 1474353, 2293438, 2948706, 3440157, 6880314, 10320471, 20640942]

約数ペア:

[(1, 20640942), (2, 10320471), (3, 6880314), (6, 3440157), (7, 2948706), (9, 2293438), (14, 1474353), (18, 1146719), (21, 982902), (42, 491451), (63, 327634), (107, 192906), (126, 163817), (214, 96453), (321, 64302), (642, 32151), (749, 27558), (963, 21434), (1498, 13779), (1531, 13482), (1926, 10717), (2247, 9186), (3062, 6741), (4494, 4593)]