21909748

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:292

約数の個数: 48

約数和(自身を含む): 45287424

約数和(自身を除く): 23377676

約数列:

[1, 2, 4, 7, 14, 28, 71, 103, 107, 142, 206, 214, 284, 412, 428, 497, 721, 749, 994, 1442, 1498, 1988, 2884, 2996, 7313, 7597, 11021, 14626, 15194, 22042, 29252, 30388, 44084, 51191, 53179, 77147, 102382, 106358, 154294, 204764, 212716, 308588, 782491, 1564982, 3129964, 5477437, 10954874, 21909748]

約数ペア:

[(1, 21909748), (2, 10954874), (4, 5477437), (7, 3129964), (14, 1564982), (28, 782491), (71, 308588), (103, 212716), (107, 204764), (142, 154294), (206, 106358), (214, 102382), (284, 77147), (412, 53179), (428, 51191), (497, 44084), (721, 30388), (749, 29252), (994, 22042), (1442, 15194), (1498, 14626), (1988, 11021), (2884, 7597), (2996, 7313)]