20523440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{547}}^1$

素因数の和:634

約数の個数: 80

約数和(自身を含む): 55448832

約数和(自身を除く): 34925392

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 67, 70, 80, 112, 134, 140, 268, 280, 335, 469, 536, 547, 560, 670, 938, 1072, 1094, 1340, 1876, 2188, 2345, 2680, 2735, 3752, 3829, 4376, 4690, 5360, 5470, 7504, 7658, 8752, 9380, 10940, 15316, 18760, 19145, 21880, 30632, 36649, 37520, 38290, 43760, 61264, 73298, 76580, 146596, 153160, 183245, 256543, 293192, 306320, 366490, 513086, 586384, 732980, 1026172, 1282715, 1465960, 2052344, 2565430, 2931920, 4104688, 5130860, 10261720, 20523440]

約数ペア:

[(1, 20523440), (2, 10261720), (4, 5130860), (5, 4104688), (7, 2931920), (8, 2565430), (10, 2052344), (14, 1465960), (16, 1282715), (20, 1026172), (28, 732980), (35, 586384), (40, 513086), (56, 366490), (67, 306320), (70, 293192), (80, 256543), (112, 183245), (134, 153160), (140, 146596), (268, 76580), (280, 73298), (335, 61264), (469, 43760), (536, 38290), (547, 37520), (560, 36649), (670, 30632), (938, 21880), (1072, 19145), (1094, 18760), (1340, 15316), (1876, 10940), (2188, 9380), (2345, 8752), (2680, 7658), (2735, 7504), (3752, 5470), (3829, 5360), (4376, 4690)]