20681164

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 42771456

約数和(自身を除く): 22090292

約数列:

[1, 2, 4, 7, 14, 28, 71, 101, 103, 142, 202, 206, 284, 404, 412, 497, 707, 721, 994, 1414, 1442, 1988, 2828, 2884, 7171, 7313, 10403, 14342, 14626, 20806, 28684, 29252, 41612, 50197, 51191, 72821, 100394, 102382, 145642, 200788, 204764, 291284, 738613, 1477226, 2954452, 5170291, 10340582, 20681164]

約数ペア:

[(1, 20681164), (2, 10340582), (4, 5170291), (7, 2954452), (14, 1477226), (28, 738613), (71, 291284), (101, 204764), (103, 200788), (142, 145642), (202, 102382), (206, 100394), (284, 72821), (404, 51191), (412, 50197), (497, 41612), (707, 29252), (721, 28684), (994, 20806), (1414, 14626), (1442, 14342), (1988, 10403), (2828, 7313), (2884, 7171)]