21095725

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1013}}^1$

素因数の和:1054

約数の個数: 36

約数和(自身を含む): 32251284

約数和(自身を除く): 11155559

約数列:

[1, 5, 7, 17, 25, 35, 49, 85, 119, 175, 245, 425, 595, 833, 1013, 1225, 2975, 4165, 5065, 7091, 17221, 20825, 25325, 35455, 49637, 86105, 120547, 177275, 248185, 430525, 602735, 843829, 1240925, 3013675, 4219145, 21095725]

約数ペア:

[(1, 21095725), (5, 4219145), (7, 3013675), (17, 1240925), (25, 843829), (35, 602735), (49, 430525), (85, 248185), (119, 177275), (175, 120547), (245, 86105), (425, 49637), (595, 35455), (833, 25325), (1013, 20825), (1225, 17221), (2975, 7091), (4165, 5065)]