20431520

素因数分解:

$2^5\times 5^1\times {\mathrm{277}}^1\times {\mathrm{461}}^1$

素因数の和:753

約数の個数: 48

約数和(自身を含む): 48548808

約数和(自身を除く): 28117288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 277, 461, 554, 922, 1108, 1385, 1844, 2216, 2305, 2770, 3688, 4432, 4610, 5540, 7376, 8864, 9220, 11080, 14752, 18440, 22160, 36880, 44320, 73760, 127697, 255394, 510788, 638485, 1021576, 1276970, 2043152, 2553940, 4086304, 5107880, 10215760, 20431520]

約数ペア:

[(1, 20431520), (2, 10215760), (4, 5107880), (5, 4086304), (8, 2553940), (10, 2043152), (16, 1276970), (20, 1021576), (32, 638485), (40, 510788), (80, 255394), (160, 127697), (277, 73760), (461, 44320), (554, 36880), (922, 22160), (1108, 18440), (1385, 14752), (1844, 11080), (2216, 9220), (2305, 8864), (2770, 7376), (3688, 5540), (4432, 4610)]