21330680

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10883}}^1$

素因数の和:10908

約数の個数: 48

約数和(自身を含む): 55834920

約数和(自身を除く): 34504240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10883, 21766, 43532, 54415, 76181, 87064, 108830, 152362, 217660, 304724, 380905, 435320, 533267, 609448, 761810, 1066534, 1523620, 2133068, 2666335, 3047240, 4266136, 5332670, 10665340, 21330680]

約数ペア:

[(1, 21330680), (2, 10665340), (4, 5332670), (5, 4266136), (7, 3047240), (8, 2666335), (10, 2133068), (14, 1523620), (20, 1066534), (28, 761810), (35, 609448), (40, 533267), (49, 435320), (56, 380905), (70, 304724), (98, 217660), (140, 152362), (196, 108830), (245, 87064), (280, 76181), (392, 54415), (490, 43532), (980, 21766), (1960, 10883)]