19947520

素因数分解:

$2^{13}\times 5^1\times {\mathrm{487}}^1$

素因数の和:518

約数の個数: 56

約数和(自身を含む): 47969424

約数和(自身を除く): 28021904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 487, 512, 640, 974, 1024, 1280, 1948, 2048, 2435, 2560, 3896, 4096, 4870, 5120, 7792, 8192, 9740, 10240, 15584, 19480, 20480, 31168, 38960, 40960, 62336, 77920, 124672, 155840, 249344, 311680, 498688, 623360, 997376, 1246720, 1994752, 2493440, 3989504, 4986880, 9973760, 19947520]

約数ペア:

[(1, 19947520), (2, 9973760), (4, 4986880), (5, 3989504), (8, 2493440), (10, 1994752), (16, 1246720), (20, 997376), (32, 623360), (40, 498688), (64, 311680), (80, 249344), (128, 155840), (160, 124672), (256, 77920), (320, 62336), (487, 40960), (512, 38960), (640, 31168), (974, 20480), (1024, 19480), (1280, 15584), (1948, 10240), (2048, 9740), (2435, 8192), (2560, 7792), (3896, 5120), (4096, 4870)]