19957760

素因数分解:

$2^{11}\times 5^1\times {\mathrm{1949}}^1$

素因数の和:1976

約数の個数: 48

約数和(自身を含む): 47911500

約数和(自身を除く): 27953740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 1949, 2048, 2560, 3898, 5120, 7796, 9745, 10240, 15592, 19490, 31184, 38980, 62368, 77960, 124736, 155920, 249472, 311840, 498944, 623680, 997888, 1247360, 1995776, 2494720, 3991552, 4989440, 9978880, 19957760]

約数ペア:

[(1, 19957760), (2, 9978880), (4, 4989440), (5, 3991552), (8, 2494720), (10, 1995776), (16, 1247360), (20, 997888), (32, 623680), (40, 498944), (64, 311840), (80, 249472), (128, 155920), (160, 124736), (256, 77960), (320, 62368), (512, 38980), (640, 31184), (1024, 19490), (1280, 15592), (1949, 10240), (2048, 9745), (2560, 7796), (3898, 5120)]