21136983

素因数分解:

$3^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{2713}}^1$

素因数の和:2783

約数の個数: 24

約数和(自身を含む): 33414768

約数和(自身を除く): 12277785

約数列:

[1, 3, 7, 21, 49, 53, 147, 159, 371, 1113, 2597, 2713, 7791, 8139, 18991, 56973, 132937, 143789, 398811, 431367, 1006523, 3019569, 7045661, 21136983]

約数ペア:

[(1, 21136983), (3, 7045661), (7, 3019569), (21, 1006523), (49, 431367), (53, 398811), (147, 143789), (159, 132937), (371, 56973), (1113, 18991), (2597, 8139), (2713, 7791)]