20217520

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{283}}^1$

素因数の和:362

約数の個数: 80

約数和(自身を含む): 50711040

約数和(自身を除く): 30493520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 47, 76, 80, 94, 95, 152, 188, 190, 235, 283, 304, 376, 380, 470, 566, 752, 760, 893, 940, 1132, 1415, 1520, 1786, 1880, 2264, 2830, 3572, 3760, 4465, 4528, 5377, 5660, 7144, 8930, 10754, 11320, 13301, 14288, 17860, 21508, 22640, 26602, 26885, 35720, 43016, 53204, 53770, 66505, 71440, 86032, 106408, 107540, 133010, 212816, 215080, 252719, 266020, 430160, 505438, 532040, 1010876, 1064080, 1263595, 2021752, 2527190, 4043504, 5054380, 10108760, 20217520]

約数ペア:

[(1, 20217520), (2, 10108760), (4, 5054380), (5, 4043504), (8, 2527190), (10, 2021752), (16, 1263595), (19, 1064080), (20, 1010876), (38, 532040), (40, 505438), (47, 430160), (76, 266020), (80, 252719), (94, 215080), (95, 212816), (152, 133010), (188, 107540), (190, 106408), (235, 86032), (283, 71440), (304, 66505), (376, 53770), (380, 53204), (470, 43016), (566, 35720), (752, 26885), (760, 26602), (893, 22640), (940, 21508), (1132, 17860), (1415, 14288), (1520, 13301), (1786, 11320), (1880, 10754), (2264, 8930), (2830, 7144), (3572, 5660), (3760, 5377), (4465, 4528)]