20401640

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{1487}}^1$

素因数の和:1519

約数の個数: 64

約数和(自身を含む): 53568000

約数和(自身を除く): 33166360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1372, 1487, 1715, 1960, 2744, 2974, 3430, 5948, 6860, 7435, 10409, 11896, 13720, 14870, 20818, 29740, 41636, 52045, 59480, 72863, 83272, 104090, 145726, 208180, 291452, 364315, 416360, 510041, 582904, 728630, 1020082, 1457260, 2040164, 2550205, 2914520, 4080328, 5100410, 10200820, 20401640]

約数ペア:

[(1, 20401640), (2, 10200820), (4, 5100410), (5, 4080328), (7, 2914520), (8, 2550205), (10, 2040164), (14, 1457260), (20, 1020082), (28, 728630), (35, 582904), (40, 510041), (49, 416360), (56, 364315), (70, 291452), (98, 208180), (140, 145726), (196, 104090), (245, 83272), (280, 72863), (343, 59480), (392, 52045), (490, 41636), (686, 29740), (980, 20818), (1372, 14870), (1487, 13720), (1715, 11896), (1960, 10409), (2744, 7435), (2974, 6860), (3430, 5948)]