20520278

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:260

約数の個数: 32

約数和(自身を含む): 33426432

約数和(自身を除く): 12906154

約数列:

[1, 2, 23, 46, 61, 71, 103, 122, 142, 206, 1403, 1633, 2369, 2806, 3266, 4331, 4738, 6283, 7313, 8662, 12566, 14626, 99613, 144509, 168199, 199226, 289018, 336398, 446093, 892186, 10260139, 20520278]

約数ペア:

[(1, 20520278), (2, 10260139), (23, 892186), (46, 446093), (61, 336398), (71, 289018), (103, 199226), (122, 168199), (142, 144509), (206, 99613), (1403, 14626), (1633, 12566), (2369, 8662), (2806, 7313), (3266, 6283), (4331, 4738)]