20181489370

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{399871}}^1$

素因数の和:399995

約数の個数: 48

約数和(自身を含む): 42667941888

約数和(自身を除く): 22486452518

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 103, 206, 245, 490, 515, 721, 1030, 1442, 3605, 5047, 7210, 10094, 25235, 50470, 399871, 799742, 1999355, 2799097, 3998710, 5598194, 13995485, 19593679, 27990970, 39187358, 41186713, 82373426, 97968395, 195936790, 205933565, 288306991, 411867130, 576613982, 1441534955, 2018148937, 2883069910, 4036297874, 10090744685, 20181489370]

約数ペア:

[(1, 20181489370), (2, 10090744685), (5, 4036297874), (7, 2883069910), (10, 2018148937), (14, 1441534955), (35, 576613982), (49, 411867130), (70, 288306991), (98, 205933565), (103, 195936790), (206, 97968395), (245, 82373426), (490, 41186713), (515, 39187358), (721, 27990970), (1030, 19593679), (1442, 13995485), (3605, 5598194), (5047, 3998710), (7210, 2799097), (10094, 1999355), (25235, 799742), (50470, 399871)]