21478158

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{349}}^1$

素因数の和:633

約数の個数: 48

約数和(自身を含む): 50450400

約数和(自身を除く): 28972242

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 117, 234, 263, 349, 526, 698, 789, 1047, 1578, 2094, 2367, 3141, 3419, 4537, 4734, 6282, 6838, 9074, 10257, 13611, 20514, 27222, 30771, 40833, 61542, 81666, 91787, 183574, 275361, 550722, 826083, 1193231, 1652166, 2386462, 3579693, 7159386, 10739079, 21478158]

約数ペア:

[(1, 21478158), (2, 10739079), (3, 7159386), (6, 3579693), (9, 2386462), (13, 1652166), (18, 1193231), (26, 826083), (39, 550722), (78, 275361), (117, 183574), (234, 91787), (263, 81666), (349, 61542), (526, 40833), (698, 30771), (789, 27222), (1047, 20514), (1578, 13611), (2094, 10257), (2367, 9074), (3141, 6838), (3419, 6282), (4537, 4734)]