21425151

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{211}}^1$

素因数の和:423

約数の個数: 32

約数和(自身を含む): 33336576

約数和(自身を除く): 11911425

約数列:

[1, 3, 11, 17, 33, 51, 181, 187, 211, 543, 561, 633, 1991, 2321, 3077, 3587, 5973, 6963, 9231, 10761, 33847, 38191, 39457, 101541, 114573, 118371, 420101, 649247, 1260303, 1947741, 7141717, 21425151]

約数ペア:

[(1, 21425151), (3, 7141717), (11, 1947741), (17, 1260303), (33, 649247), (51, 420101), (181, 118371), (187, 114573), (211, 101541), (543, 39457), (561, 38191), (633, 33847), (1991, 10761), (2321, 9231), (3077, 6963), (3587, 5973)]