19708740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{491}}^1$

素因数の和:729

約数の個数: 72

約数和(自身を含む): 60173568

約数和(自身を除く): 40464828

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 223, 446, 491, 669, 892, 982, 1115, 1338, 1473, 1964, 2007, 2230, 2455, 2676, 2946, 3345, 4014, 4419, 4460, 4910, 5892, 6690, 7365, 8028, 8838, 9820, 10035, 13380, 14730, 17676, 20070, 22095, 29460, 40140, 44190, 88380, 109493, 218986, 328479, 437972, 547465, 656958, 985437, 1094930, 1313916, 1642395, 1970874, 2189860, 3284790, 3941748, 4927185, 6569580, 9854370, 19708740]

約数ペア:

[(1, 19708740), (2, 9854370), (3, 6569580), (4, 4927185), (5, 3941748), (6, 3284790), (9, 2189860), (10, 1970874), (12, 1642395), (15, 1313916), (18, 1094930), (20, 985437), (30, 656958), (36, 547465), (45, 437972), (60, 328479), (90, 218986), (180, 109493), (223, 88380), (446, 44190), (491, 40140), (669, 29460), (892, 22095), (982, 20070), (1115, 17676), (1338, 14730), (1473, 13380), (1964, 10035), (2007, 9820), (2230, 8838), (2455, 8028), (2676, 7365), (2946, 6690), (3345, 5892), (4014, 4910), (4419, 4460)]