20551420

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1039}}^1$

素因数の和:1114

約数の個数: 48

約数和(自身を含む): 46126080

約数和(自身を除く): 25574660

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1039, 1978, 2078, 3956, 4156, 4945, 5195, 9890, 10390, 19780, 20780, 23897, 44677, 47794, 89354, 95588, 119485, 178708, 223385, 238970, 446770, 477940, 893540, 1027571, 2055142, 4110284, 5137855, 10275710, 20551420]

約数ペア:

[(1, 20551420), (2, 10275710), (4, 5137855), (5, 4110284), (10, 2055142), (20, 1027571), (23, 893540), (43, 477940), (46, 446770), (86, 238970), (92, 223385), (115, 178708), (172, 119485), (215, 95588), (230, 89354), (430, 47794), (460, 44677), (860, 23897), (989, 20780), (1039, 19780), (1978, 10390), (2078, 9890), (3956, 5195), (4156, 4945)]