18420520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{263}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 44478720

約数和(自身を除く): 26058200

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 103, 136, 170, 206, 263, 340, 412, 515, 526, 680, 824, 1030, 1052, 1315, 1751, 2060, 2104, 2630, 3502, 4120, 4471, 5260, 7004, 8755, 8942, 10520, 14008, 17510, 17884, 22355, 27089, 35020, 35768, 44710, 54178, 70040, 89420, 108356, 135445, 178840, 216712, 270890, 460513, 541780, 921026, 1083560, 1842052, 2302565, 3684104, 4605130, 9210260, 18420520]

約数ペア:

[(1, 18420520), (2, 9210260), (4, 4605130), (5, 3684104), (8, 2302565), (10, 1842052), (17, 1083560), (20, 921026), (34, 541780), (40, 460513), (68, 270890), (85, 216712), (103, 178840), (136, 135445), (170, 108356), (206, 89420), (263, 70040), (340, 54178), (412, 44710), (515, 35768), (526, 35020), (680, 27089), (824, 22355), (1030, 17884), (1052, 17510), (1315, 14008), (1751, 10520), (2060, 8942), (2104, 8755), (2630, 7004), (3502, 5260), (4120, 4471)]