20415040

素因数分解:

$2^6\times 5^1\times {\mathrm{131}}^1\times {\mathrm{487}}^1$

素因数の和:635

約数の個数: 56

約数和(自身を含む): 49084992

約数和(自身を除く): 28669952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 131, 160, 262, 320, 487, 524, 655, 974, 1048, 1310, 1948, 2096, 2435, 2620, 3896, 4192, 4870, 5240, 7792, 8384, 9740, 10480, 15584, 19480, 20960, 31168, 38960, 41920, 63797, 77920, 127594, 155840, 255188, 318985, 510376, 637970, 1020752, 1275940, 2041504, 2551880, 4083008, 5103760, 10207520, 20415040]

約数ペア:

[(1, 20415040), (2, 10207520), (4, 5103760), (5, 4083008), (8, 2551880), (10, 2041504), (16, 1275940), (20, 1020752), (32, 637970), (40, 510376), (64, 318985), (80, 255188), (131, 155840), (160, 127594), (262, 77920), (320, 63797), (487, 41920), (524, 38960), (655, 31168), (974, 20960), (1048, 19480), (1310, 15584), (1948, 10480), (2096, 9740), (2435, 8384), (2620, 7792), (3896, 5240), (4192, 4870)]