20940080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{613}}^1$

素因数の和:694

約数の個数: 80

約数和(自身を含む): 56645184

約数和(自身を除く): 35705104

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 61, 70, 80, 112, 122, 140, 244, 280, 305, 427, 488, 560, 610, 613, 854, 976, 1220, 1226, 1708, 2135, 2440, 2452, 3065, 3416, 4270, 4291, 4880, 4904, 6130, 6832, 8540, 8582, 9808, 12260, 17080, 17164, 21455, 24520, 34160, 34328, 37393, 42910, 49040, 68656, 74786, 85820, 149572, 171640, 186965, 261751, 299144, 343280, 373930, 523502, 598288, 747860, 1047004, 1308755, 1495720, 2094008, 2617510, 2991440, 4188016, 5235020, 10470040, 20940080]

約数ペア:

[(1, 20940080), (2, 10470040), (4, 5235020), (5, 4188016), (7, 2991440), (8, 2617510), (10, 2094008), (14, 1495720), (16, 1308755), (20, 1047004), (28, 747860), (35, 598288), (40, 523502), (56, 373930), (61, 343280), (70, 299144), (80, 261751), (112, 186965), (122, 171640), (140, 149572), (244, 85820), (280, 74786), (305, 68656), (427, 49040), (488, 42910), (560, 37393), (610, 34328), (613, 34160), (854, 24520), (976, 21455), (1220, 17164), (1226, 17080), (1708, 12260), (2135, 9808), (2440, 8582), (2452, 8540), (3065, 6832), (3416, 6130), (4270, 4904), (4291, 4880)]