21058175

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1031}}^1$

素因数の和:1103

約数の個数: 24

約数和(自身を含む): 28152960

約数和(自身を除く): 7094785

約数列:

[1, 5, 19, 25, 43, 95, 215, 475, 817, 1031, 1075, 4085, 5155, 19589, 20425, 25775, 44333, 97945, 221665, 489725, 842327, 1108325, 4211635, 21058175]

約数ペア:

[(1, 21058175), (5, 4211635), (19, 1108325), (25, 842327), (43, 489725), (95, 221665), (215, 97945), (475, 44333), (817, 25775), (1031, 20425), (1075, 19589), (4085, 5155)]