19425920

素因数分解:

$2^7\times 5^1\times {\mathrm{127}}^1\times {\mathrm{239}}^1$

素因数の和:385

約数の個数: 64

約数和(自身を含む): 47001600

約数和(自身を除く): 27575680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 239, 254, 320, 478, 508, 635, 640, 956, 1016, 1195, 1270, 1912, 2032, 2390, 2540, 3824, 4064, 4780, 5080, 7648, 8128, 9560, 10160, 15296, 16256, 19120, 20320, 30353, 30592, 38240, 40640, 60706, 76480, 81280, 121412, 151765, 152960, 242824, 303530, 485648, 607060, 971296, 1214120, 1942592, 2428240, 3885184, 4856480, 9712960, 19425920]

約数ペア:

[(1, 19425920), (2, 9712960), (4, 4856480), (5, 3885184), (8, 2428240), (10, 1942592), (16, 1214120), (20, 971296), (32, 607060), (40, 485648), (64, 303530), (80, 242824), (127, 152960), (128, 151765), (160, 121412), (239, 81280), (254, 76480), (320, 60706), (478, 40640), (508, 38240), (635, 30592), (640, 30353), (956, 20320), (1016, 19120), (1195, 16256), (1270, 15296), (1912, 10160), (2032, 9560), (2390, 8128), (2540, 7648), (3824, 5080), (4064, 4780)]