20166440

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10289}}^1$

素因数の和:10314

約数の個数: 48

約数和(自身を含む): 52787700

約数和(自身を除く): 32621260

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, 10289, 20578, 41156, 51445, 72023, 82312, 102890, 144046, 205780, 288092, 360115, 411560, 504161, 576184, 720230, 1008322, 1440460, 2016644, 2520805, 2880920, 4033288, 5041610, 10083220, 20166440]

約数ペア:

[(1, 20166440), (2, 10083220), (4, 5041610), (5, 4033288), (7, 2880920), (8, 2520805), (10, 2016644), (14, 1440460), (20, 1008322), (28, 720230), (35, 576184), (40, 504161), (49, 411560), (56, 360115), (70, 288092), (98, 205780), (140, 144046), (196, 102890), (245, 82312), (280, 72023), (392, 51445), (490, 41156), (980, 20578), (1960, 10289)]