20978874

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{167}}^1\times {\mathrm{997}}^1$

素因数の和:1179

約数の個数: 48

約数和(自身を含む): 52311168

約数和(自身を除く): 31332294

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 167, 334, 501, 997, 1002, 1169, 1503, 1994, 2338, 2991, 3006, 3507, 5982, 6979, 7014, 8973, 10521, 13958, 17946, 20937, 21042, 41874, 62811, 125622, 166499, 332998, 499497, 998994, 1165493, 1498491, 2330986, 2996982, 3496479, 6992958, 10489437, 20978874]

約数ペア:

[(1, 20978874), (2, 10489437), (3, 6992958), (6, 3496479), (7, 2996982), (9, 2330986), (14, 1498491), (18, 1165493), (21, 998994), (42, 499497), (63, 332998), (126, 166499), (167, 125622), (334, 62811), (501, 41874), (997, 21042), (1002, 20937), (1169, 17946), (1503, 13958), (1994, 10521), (2338, 8973), (2991, 7014), (3006, 6979), (3507, 5982)]