19722400

素因数分解:

$2^5\times 5^2\times {\mathrm{89}}^1\times {\mathrm{277}}^1$

素因数の和:386

約数の個数: 72

約数和(自身を含む): 48864060

約数和(自身を除く): 29141660

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 89, 100, 160, 178, 200, 277, 356, 400, 445, 554, 712, 800, 890, 1108, 1385, 1424, 1780, 2216, 2225, 2770, 2848, 3560, 4432, 4450, 5540, 6925, 7120, 8864, 8900, 11080, 13850, 14240, 17800, 22160, 24653, 27700, 35600, 44320, 49306, 55400, 71200, 98612, 110800, 123265, 197224, 221600, 246530, 394448, 493060, 616325, 788896, 986120, 1232650, 1972240, 2465300, 3944480, 4930600, 9861200, 19722400]

約数ペア:

[(1, 19722400), (2, 9861200), (4, 4930600), (5, 3944480), (8, 2465300), (10, 1972240), (16, 1232650), (20, 986120), (25, 788896), (32, 616325), (40, 493060), (50, 394448), (80, 246530), (89, 221600), (100, 197224), (160, 123265), (178, 110800), (200, 98612), (277, 71200), (356, 55400), (400, 49306), (445, 44320), (554, 35600), (712, 27700), (800, 24653), (890, 22160), (1108, 17800), (1385, 14240), (1424, 13850), (1780, 11080), (2216, 8900), (2225, 8864), (2770, 7120), (2848, 6925), (3560, 5540), (4432, 4450)]