20449960

素因数分解:

$2^3\times 5^1\times {\mathrm{461}}^1\times {\mathrm{1109}}^1$

素因数の和:1581

約数の個数: 32

約数和(自身を含む): 46153800

約数和(自身を除く): 25703840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 461, 922, 1109, 1844, 2218, 2305, 3688, 4436, 4610, 5545, 8872, 9220, 11090, 18440, 22180, 44360, 511249, 1022498, 2044996, 2556245, 4089992, 5112490, 10224980, 20449960]

約数ペア:

[(1, 20449960), (2, 10224980), (4, 5112490), (5, 4089992), (8, 2556245), (10, 2044996), (20, 1022498), (40, 511249), (461, 44360), (922, 22180), (1109, 18440), (1844, 11090), (2218, 9220), (2305, 8872), (3688, 5545), (4436, 4610)]