21786780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{149}}^1\times {\mathrm{2437}}^1$

素因数の和:2598

約数の個数: 48

約数和(自身を含む): 61437600

約数和(自身を除く): 39650820

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 149, 298, 447, 596, 745, 894, 1490, 1788, 2235, 2437, 2980, 4470, 4874, 7311, 8940, 9748, 12185, 14622, 24370, 29244, 36555, 48740, 73110, 146220, 363113, 726226, 1089339, 1452452, 1815565, 2178678, 3631130, 4357356, 5446695, 7262260, 10893390, 21786780]

約数ペア:

[(1, 21786780), (2, 10893390), (3, 7262260), (4, 5446695), (5, 4357356), (6, 3631130), (10, 2178678), (12, 1815565), (15, 1452452), (20, 1089339), (30, 726226), (60, 363113), (149, 146220), (298, 73110), (447, 48740), (596, 36555), (745, 29244), (894, 24370), (1490, 14622), (1788, 12185), (2235, 9748), (2437, 8940), (2980, 7311), (4470, 4874)]