28216520

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{271}}^1$

素因数の和:438

約数の個数: 64

約数和(自身を含む): 67564800

約数和(自身を除く): 39348280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 137, 152, 190, 271, 274, 380, 542, 548, 685, 760, 1084, 1096, 1355, 1370, 2168, 2603, 2710, 2740, 5149, 5206, 5420, 5480, 10298, 10412, 10840, 13015, 20596, 20824, 25745, 26030, 37127, 41192, 51490, 52060, 74254, 102980, 104120, 148508, 185635, 205960, 297016, 371270, 705413, 742540, 1410826, 1485080, 2821652, 3527065, 5643304, 7054130, 14108260, 28216520]

約数ペア:

[(1, 28216520), (2, 14108260), (4, 7054130), (5, 5643304), (8, 3527065), (10, 2821652), (19, 1485080), (20, 1410826), (38, 742540), (40, 705413), (76, 371270), (95, 297016), (137, 205960), (152, 185635), (190, 148508), (271, 104120), (274, 102980), (380, 74254), (542, 52060), (548, 51490), (685, 41192), (760, 37127), (1084, 26030), (1096, 25745), (1355, 20824), (1370, 20596), (2168, 13015), (2603, 10840), (2710, 10412), (2740, 10298), (5149, 5480), (5206, 5420)]