21364280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1861}}^1$

素因数の和:1920

約数の個数: 64

約数和(自身を含む): 56306880

約数和(自身を除く): 34942600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 41, 56, 70, 82, 140, 164, 205, 280, 287, 328, 410, 574, 820, 1148, 1435, 1640, 1861, 2296, 2870, 3722, 5740, 7444, 9305, 11480, 13027, 14888, 18610, 26054, 37220, 52108, 65135, 74440, 76301, 104216, 130270, 152602, 260540, 305204, 381505, 521080, 534107, 610408, 763010, 1068214, 1526020, 2136428, 2670535, 3052040, 4272856, 5341070, 10682140, 21364280]

約数ペア:

[(1, 21364280), (2, 10682140), (4, 5341070), (5, 4272856), (7, 3052040), (8, 2670535), (10, 2136428), (14, 1526020), (20, 1068214), (28, 763010), (35, 610408), (40, 534107), (41, 521080), (56, 381505), (70, 305204), (82, 260540), (140, 152602), (164, 130270), (205, 104216), (280, 76301), (287, 74440), (328, 65135), (410, 52108), (574, 37220), (820, 26054), (1148, 18610), (1435, 14888), (1640, 13027), (1861, 11480), (2296, 9305), (2870, 7444), (3722, 5740)]