18987388

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{9551}}^1$

素因数の和:9633

約数の個数: 24

約数和(自身を含む): 38513664

約数和(自身を除く): 19526276

約数列:

[1, 2, 4, 7, 14, 28, 71, 142, 284, 497, 994, 1988, 9551, 19102, 38204, 66857, 133714, 267428, 678121, 1356242, 2712484, 4746847, 9493694, 18987388]

約数ペア:

[(1, 18987388), (2, 9493694), (4, 4746847), (7, 2712484), (14, 1356242), (28, 678121), (71, 267428), (142, 133714), (284, 66857), (497, 38204), (994, 19102), (1988, 9551)]