20281730

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:243

約数の個数: 64

約数和(自身を含む): 44029440

約数和(自身を除く): 23747710

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 58, 70, 97, 103, 145, 194, 203, 206, 290, 406, 485, 515, 679, 721, 970, 1015, 1030, 1358, 1442, 2030, 2813, 2987, 3395, 3605, 5626, 5974, 6790, 7210, 9991, 14065, 14935, 19691, 19982, 20909, 28130, 29870, 39382, 41818, 49955, 69937, 98455, 99910, 104545, 139874, 196910, 209090, 289739, 349685, 579478, 699370, 1448695, 2028173, 2897390, 4056346, 10140865, 20281730]

約数ペア:

[(1, 20281730), (2, 10140865), (5, 4056346), (7, 2897390), (10, 2028173), (14, 1448695), (29, 699370), (35, 579478), (58, 349685), (70, 289739), (97, 209090), (103, 196910), (145, 139874), (194, 104545), (203, 99910), (206, 98455), (290, 69937), (406, 49955), (485, 41818), (515, 39382), (679, 29870), (721, 28130), (970, 20909), (1015, 19982), (1030, 19691), (1358, 14935), (1442, 14065), (2030, 9991), (2813, 7210), (2987, 6790), (3395, 5974), (3605, 5626)]