21087521

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{6263}}^1$

素因数の和:6320

約数の個数: 16

約数和(自身を含む): 26659584

約数和(自身を除く): 5572063

約数列:

[1, 7, 13, 37, 91, 259, 481, 3367, 6263, 43841, 81419, 231731, 569933, 1622117, 3012503, 21087521]

約数ペア:

[(1, 21087521), (7, 3012503), (13, 1622117), (37, 569933), (91, 231731), (259, 81419), (481, 43841), (3367, 6263)]