21470575

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1031}}^1$

素因数の和:1072

約数の個数: 36

約数和(自身を含む): 32823792

約数和(自身を除く): 11353217

約数列:

[1, 5, 7, 17, 25, 35, 49, 85, 119, 175, 245, 425, 595, 833, 1031, 1225, 2975, 4165, 5155, 7217, 17527, 20825, 25775, 36085, 50519, 87635, 122689, 180425, 252595, 438175, 613445, 858823, 1262975, 3067225, 4294115, 21470575]

約数ペア:

[(1, 21470575), (5, 4294115), (7, 3067225), (17, 1262975), (25, 858823), (35, 613445), (49, 438175), (85, 252595), (119, 180425), (175, 122689), (245, 87635), (425, 50519), (595, 36085), (833, 25775), (1031, 20825), (1225, 17527), (2975, 7217), (4165, 5155)]