19964480

素因数分解:

$2^6\times 5^1\times {\mathrm{89}}^1\times {\mathrm{701}}^1$

素因数の和:807

約数の個数: 56

約数和(自身を含む): 48143160

約数和(自身を除く): 28178680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 160, 178, 320, 356, 445, 701, 712, 890, 1402, 1424, 1780, 2804, 2848, 3505, 3560, 5608, 5696, 7010, 7120, 11216, 14020, 14240, 22432, 28040, 28480, 44864, 56080, 62389, 112160, 124778, 224320, 249556, 311945, 499112, 623890, 998224, 1247780, 1996448, 2495560, 3992896, 4991120, 9982240, 19964480]

約数ペア:

[(1, 19964480), (2, 9982240), (4, 4991120), (5, 3992896), (8, 2495560), (10, 1996448), (16, 1247780), (20, 998224), (32, 623890), (40, 499112), (64, 311945), (80, 249556), (89, 224320), (160, 124778), (178, 112160), (320, 62389), (356, 56080), (445, 44864), (701, 28480), (712, 28040), (890, 22432), (1402, 14240), (1424, 14020), (1780, 11216), (2804, 7120), (2848, 7010), (3505, 5696), (3560, 5608)]