21388975

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{853}}^1$

素因数の和:939

約数の個数: 24

約数和(自身を含む): 28591920

約数和(自身を除く): 7202945

約数列:

[1, 5, 17, 25, 59, 85, 295, 425, 853, 1003, 1475, 4265, 5015, 14501, 21325, 25075, 50327, 72505, 251635, 362525, 855559, 1258175, 4277795, 21388975]

約数ペア:

[(1, 21388975), (5, 4277795), (17, 1258175), (25, 855559), (59, 362525), (85, 251635), (295, 72505), (425, 50327), (853, 25075), (1003, 21325), (1475, 14501), (4265, 5015)]