20888840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1223}}^1$

素因数の和:1302

約数の個数: 64

約数和(自身を含む): 54639360

約数和(自身を除く): 33750520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 61, 70, 122, 140, 244, 280, 305, 427, 488, 610, 854, 1220, 1223, 1708, 2135, 2440, 2446, 3416, 4270, 4892, 6115, 8540, 8561, 9784, 12230, 17080, 17122, 24460, 34244, 42805, 48920, 68488, 74603, 85610, 149206, 171220, 298412, 342440, 373015, 522221, 596824, 746030, 1044442, 1492060, 2088884, 2611105, 2984120, 4177768, 5222210, 10444420, 20888840]

約数ペア:

[(1, 20888840), (2, 10444420), (4, 5222210), (5, 4177768), (7, 2984120), (8, 2611105), (10, 2088884), (14, 1492060), (20, 1044442), (28, 746030), (35, 596824), (40, 522221), (56, 373015), (61, 342440), (70, 298412), (122, 171220), (140, 149206), (244, 85610), (280, 74603), (305, 68488), (427, 48920), (488, 42805), (610, 34244), (854, 24460), (1220, 17122), (1223, 17080), (1708, 12230), (2135, 9784), (2440, 8561), (2446, 8540), (3416, 6115), (4270, 4892)]