19618400

素因数分解:

$2^5\times 5^2\times {\mathrm{137}}^1\times {\mathrm{179}}^1$

素因数の和:336

約数の個数: 72

約数和(自身を含む): 48512520

約数和(自身を除く): 28894120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 137, 160, 179, 200, 274, 358, 400, 548, 685, 716, 800, 895, 1096, 1370, 1432, 1790, 2192, 2740, 2864, 3425, 3580, 4384, 4475, 5480, 5728, 6850, 7160, 8950, 10960, 13700, 14320, 17900, 21920, 24523, 27400, 28640, 35800, 49046, 54800, 71600, 98092, 109600, 122615, 143200, 196184, 245230, 392368, 490460, 613075, 784736, 980920, 1226150, 1961840, 2452300, 3923680, 4904600, 9809200, 19618400]

約数ペア:

[(1, 19618400), (2, 9809200), (4, 4904600), (5, 3923680), (8, 2452300), (10, 1961840), (16, 1226150), (20, 980920), (25, 784736), (32, 613075), (40, 490460), (50, 392368), (80, 245230), (100, 196184), (137, 143200), (160, 122615), (179, 109600), (200, 98092), (274, 71600), (358, 54800), (400, 49046), (548, 35800), (685, 28640), (716, 27400), (800, 24523), (895, 21920), (1096, 17900), (1370, 14320), (1432, 13700), (1790, 10960), (2192, 8950), (2740, 7160), (2864, 6850), (3425, 5728), (3580, 5480), (4384, 4475)]