21078680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{907}}^1$

素因数の和:1008

約数の個数: 64

約数和(自身を含む): 54915840

約数和(自身を除く): 33837160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 83, 140, 166, 280, 332, 415, 581, 664, 830, 907, 1162, 1660, 1814, 2324, 2905, 3320, 3628, 4535, 4648, 5810, 6349, 7256, 9070, 11620, 12698, 18140, 23240, 25396, 31745, 36280, 50792, 63490, 75281, 126980, 150562, 253960, 301124, 376405, 526967, 602248, 752810, 1053934, 1505620, 2107868, 2634835, 3011240, 4215736, 5269670, 10539340, 21078680]

約数ペア:

[(1, 21078680), (2, 10539340), (4, 5269670), (5, 4215736), (7, 3011240), (8, 2634835), (10, 2107868), (14, 1505620), (20, 1053934), (28, 752810), (35, 602248), (40, 526967), (56, 376405), (70, 301124), (83, 253960), (140, 150562), (166, 126980), (280, 75281), (332, 63490), (415, 50792), (581, 36280), (664, 31745), (830, 25396), (907, 23240), (1162, 18140), (1660, 12698), (1814, 11620), (2324, 9070), (2905, 7256), (3320, 6349), (3628, 5810), (4535, 4648)]