21287504

素因数分解:

$2^4\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2677}}^1$

素因数の和:2763

約数の個数: 40

約数和(自身を含む): 47818368

約数和(自身を除く): 26530864

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 71, 112, 142, 284, 497, 568, 994, 1136, 1988, 2677, 3976, 5354, 7952, 10708, 18739, 21416, 37478, 42832, 74956, 149912, 190067, 299824, 380134, 760268, 1330469, 1520536, 2660938, 3041072, 5321876, 10643752, 21287504]

約数ペア:

[(1, 21287504), (2, 10643752), (4, 5321876), (7, 3041072), (8, 2660938), (14, 1520536), (16, 1330469), (28, 760268), (56, 380134), (71, 299824), (112, 190067), (142, 149912), (284, 74956), (497, 42832), (568, 37478), (994, 21416), (1136, 18739), (1988, 10708), (2677, 7952), (3976, 5354)]