21021920

素因数分解:

$2^5\times 5^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:172

約数の個数: 96

約数和(自身を含む): 52744608

約数和(自身を除く): 31722688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 53, 67, 74, 80, 106, 134, 148, 160, 185, 212, 265, 268, 296, 335, 370, 424, 530, 536, 592, 670, 740, 848, 1060, 1072, 1184, 1340, 1480, 1696, 1961, 2120, 2144, 2479, 2680, 2960, 3551, 3922, 4240, 4958, 5360, 5920, 7102, 7844, 8480, 9805, 9916, 10720, 12395, 14204, 15688, 17755, 19610, 19832, 24790, 28408, 31376, 35510, 39220, 39664, 49580, 56816, 62752, 71020, 78440, 79328, 99160, 113632, 131387, 142040, 156880, 198320, 262774, 284080, 313760, 396640, 525548, 568160, 656935, 1051096, 1313870, 2102192, 2627740, 4204384, 5255480, 10510960, 21021920]

約数ペア:

[(1, 21021920), (2, 10510960), (4, 5255480), (5, 4204384), (8, 2627740), (10, 2102192), (16, 1313870), (20, 1051096), (32, 656935), (37, 568160), (40, 525548), (53, 396640), (67, 313760), (74, 284080), (80, 262774), (106, 198320), (134, 156880), (148, 142040), (160, 131387), (185, 113632), (212, 99160), (265, 79328), (268, 78440), (296, 71020), (335, 62752), (370, 56816), (424, 49580), (530, 39664), (536, 39220), (592, 35510), (670, 31376), (740, 28408), (848, 24790), (1060, 19832), (1072, 19610), (1184, 17755), (1340, 15688), (1480, 14204), (1696, 12395), (1961, 10720), (2120, 9916), (2144, 9805), (2479, 8480), (2680, 7844), (2960, 7102), (3551, 5920), (3922, 5360), (4240, 4958)]