20713840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{787}}^1$

素因数の和:854

約数の個数: 80

約数和(自身を含む): 56282112

約数和(自身を除く): 35568272

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 47, 56, 70, 80, 94, 112, 140, 188, 235, 280, 329, 376, 470, 560, 658, 752, 787, 940, 1316, 1574, 1645, 1880, 2632, 3148, 3290, 3760, 3935, 5264, 5509, 6296, 6580, 7870, 11018, 12592, 13160, 15740, 22036, 26320, 27545, 31480, 36989, 44072, 55090, 62960, 73978, 88144, 110180, 147956, 184945, 220360, 258923, 295912, 369890, 440720, 517846, 591824, 739780, 1035692, 1294615, 1479560, 2071384, 2589230, 2959120, 4142768, 5178460, 10356920, 20713840]

約数ペア:

[(1, 20713840), (2, 10356920), (4, 5178460), (5, 4142768), (7, 2959120), (8, 2589230), (10, 2071384), (14, 1479560), (16, 1294615), (20, 1035692), (28, 739780), (35, 591824), (40, 517846), (47, 440720), (56, 369890), (70, 295912), (80, 258923), (94, 220360), (112, 184945), (140, 147956), (188, 110180), (235, 88144), (280, 73978), (329, 62960), (376, 55090), (470, 44072), (560, 36989), (658, 31480), (752, 27545), (787, 26320), (940, 22036), (1316, 15740), (1574, 13160), (1645, 12592), (1880, 11018), (2632, 7870), (3148, 6580), (3290, 6296), (3760, 5509), (3935, 5264)]