20535040

素因数分解:

$2^8\times 5^1\times {\mathrm{61}}^1\times {\mathrm{263}}^1$

素因数の和:345

約数の個数: 72

約数和(自身を含む): 50184288

約数和(自身を除く): 29649248

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 244, 256, 263, 305, 320, 488, 526, 610, 640, 976, 1052, 1220, 1280, 1315, 1952, 2104, 2440, 2630, 3904, 4208, 4880, 5260, 7808, 8416, 9760, 10520, 15616, 16043, 16832, 19520, 21040, 32086, 33664, 39040, 42080, 64172, 67328, 78080, 80215, 84160, 128344, 160430, 168320, 256688, 320860, 336640, 513376, 641720, 1026752, 1283440, 2053504, 2566880, 4107008, 5133760, 10267520, 20535040]

約数ペア:

[(1, 20535040), (2, 10267520), (4, 5133760), (5, 4107008), (8, 2566880), (10, 2053504), (16, 1283440), (20, 1026752), (32, 641720), (40, 513376), (61, 336640), (64, 320860), (80, 256688), (122, 168320), (128, 160430), (160, 128344), (244, 84160), (256, 80215), (263, 78080), (305, 67328), (320, 64172), (488, 42080), (526, 39040), (610, 33664), (640, 32086), (976, 21040), (1052, 19520), (1220, 16832), (1280, 16043), (1315, 15616), (1952, 10520), (2104, 9760), (2440, 8416), (2630, 7808), (3904, 5260), (4208, 4880)]