31191381

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{173}}^1$

素因数の和:282

約数の個数: 48

約数和(自身を含む): 51682176

約数和(自身を除く): 20490795

約数列:

[1, 3, 9, 13, 23, 39, 67, 69, 117, 173, 201, 207, 299, 519, 603, 871, 897, 1541, 1557, 2249, 2613, 2691, 3979, 4623, 6747, 7839, 11591, 11937, 13869, 20033, 20241, 34773, 35811, 51727, 60099, 104319, 150683, 155181, 180297, 266593, 452049, 465543, 799779, 1356147, 2399337, 3465709, 10397127, 31191381]

約数ペア:

[(1, 31191381), (3, 10397127), (9, 3465709), (13, 2399337), (23, 1356147), (39, 799779), (67, 465543), (69, 452049), (117, 266593), (173, 180297), (201, 155181), (207, 150683), (299, 104319), (519, 60099), (603, 51727), (871, 35811), (897, 34773), (1541, 20241), (1557, 20033), (2249, 13869), (2613, 11937), (2691, 11591), (3979, 7839), (4623, 6747)]