21238175

素因数分解:

$5^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{773}}^1$

素因数の和:947

約数の個数: 24

約数和(自身を含む): 30328416

約数和(自身を除く): 9090241

約数列:

[1, 5, 7, 25, 35, 157, 175, 773, 785, 1099, 3865, 3925, 5411, 5495, 19325, 27055, 27475, 121361, 135275, 606805, 849527, 3034025, 4247635, 21238175]

約数ペア:

[(1, 21238175), (5, 4247635), (7, 3034025), (25, 849527), (35, 606805), (157, 135275), (175, 121361), (773, 27475), (785, 27055), (1099, 19325), (3865, 5495), (3925, 5411)]