21457553

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{643}}^1$

素因数の和:824

約数の個数: 16

約数和(自身を含む): 24667776

約数和(自身を除く): 3210223

約数列:

[1, 13, 17, 151, 221, 643, 1963, 2567, 8359, 10931, 33371, 97093, 142103, 1262209, 1650581, 21457553]

約数ペア:

[(1, 21457553), (13, 1650581), (17, 1262209), (151, 142103), (221, 97093), (643, 33371), (1963, 10931), (2567, 8359)]