212291775

素因数分解:

$3^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:321

約数の個数: 72

約数和(自身を含む): 392412384

約数和(自身を除く): 180120609

約数列:

[1, 3, 5, 9, 15, 25, 45, 71, 75, 97, 137, 213, 225, 291, 355, 411, 485, 639, 685, 873, 1065, 1233, 1455, 1775, 2055, 2425, 3195, 3425, 4365, 5325, 6165, 6887, 7275, 9727, 10275, 13289, 15975, 20661, 21825, 29181, 30825, 34435, 39867, 48635, 61983, 66445, 87543, 103305, 119601, 145905, 172175, 199335, 243175, 309915, 332225, 437715, 516525, 598005, 729525, 943519, 996675, 1549575, 2188575, 2830557, 2990025, 4717595, 8491671, 14152785, 23587975, 42458355, 70763925, 212291775]

約数ペア:

[(1, 212291775), (3, 70763925), (5, 42458355), (9, 23587975), (15, 14152785), (25, 8491671), (45, 4717595), (71, 2990025), (75, 2830557), (97, 2188575), (137, 1549575), (213, 996675), (225, 943519), (291, 729525), (355, 598005), (411, 516525), (485, 437715), (639, 332225), (685, 309915), (873, 243175), (1065, 199335), (1233, 172175), (1455, 145905), (1775, 119601), (2055, 103305), (2425, 87543), (3195, 66445), (3425, 61983), (4365, 48635), (5325, 39867), (6165, 34435), (6887, 30825), (7275, 29181), (9727, 21825), (10275, 20661), (13289, 15975)]