19904800

素因数分解:

$2^5\times 5^2\times {\mathrm{139}}^1\times {\mathrm{179}}^1$

素因数の和:338

約数の個数: 72

約数和(自身を含む): 49215600

約数和(自身を除く): 29310800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 139, 160, 179, 200, 278, 358, 400, 556, 695, 716, 800, 895, 1112, 1390, 1432, 1790, 2224, 2780, 2864, 3475, 3580, 4448, 4475, 5560, 5728, 6950, 7160, 8950, 11120, 13900, 14320, 17900, 22240, 24881, 27800, 28640, 35800, 49762, 55600, 71600, 99524, 111200, 124405, 143200, 199048, 248810, 398096, 497620, 622025, 796192, 995240, 1244050, 1990480, 2488100, 3980960, 4976200, 9952400, 19904800]

約数ペア:

[(1, 19904800), (2, 9952400), (4, 4976200), (5, 3980960), (8, 2488100), (10, 1990480), (16, 1244050), (20, 995240), (25, 796192), (32, 622025), (40, 497620), (50, 398096), (80, 248810), (100, 199048), (139, 143200), (160, 124405), (179, 111200), (200, 99524), (278, 71600), (358, 55600), (400, 49762), (556, 35800), (695, 28640), (716, 27800), (800, 24881), (895, 22240), (1112, 17900), (1390, 14320), (1432, 13900), (1790, 11120), (2224, 8950), (2780, 7160), (2864, 6950), (3475, 5728), (3580, 5560), (4448, 4475)]