20272040

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{263}}^1$

素因数の和:362

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 27628120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 47, 82, 94, 164, 188, 205, 235, 263, 328, 376, 410, 470, 526, 820, 940, 1052, 1315, 1640, 1880, 1927, 2104, 2630, 3854, 5260, 7708, 9635, 10520, 10783, 12361, 15416, 19270, 21566, 24722, 38540, 43132, 49444, 53915, 61805, 77080, 86264, 98888, 107830, 123610, 215660, 247220, 431320, 494440, 506801, 1013602, 2027204, 2534005, 4054408, 5068010, 10136020, 20272040]

約数ペア:

[(1, 20272040), (2, 10136020), (4, 5068010), (5, 4054408), (8, 2534005), (10, 2027204), (20, 1013602), (40, 506801), (41, 494440), (47, 431320), (82, 247220), (94, 215660), (164, 123610), (188, 107830), (205, 98888), (235, 86264), (263, 77080), (328, 61805), (376, 53915), (410, 49444), (470, 43132), (526, 38540), (820, 24722), (940, 21566), (1052, 19270), (1315, 15416), (1640, 12361), (1880, 10783), (1927, 10520), (2104, 9635), (2630, 7708), (3854, 5260)]