20012825

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{31}}^2$

素因数の和:103

約数の個数: 54

約数和(自身を含む): 31583358

約数和(自身を除く): 11570533

約数列:

[1, 5, 7, 17, 25, 31, 35, 49, 85, 119, 155, 175, 217, 245, 425, 527, 595, 775, 833, 961, 1085, 1225, 1519, 2635, 2975, 3689, 4165, 4805, 5425, 6727, 7595, 13175, 16337, 18445, 20825, 24025, 25823, 33635, 37975, 47089, 81685, 92225, 114359, 129115, 168175, 235445, 408425, 571795, 645575, 800513, 1177225, 2858975, 4002565, 20012825]

約数ペア:

[(1, 20012825), (5, 4002565), (7, 2858975), (17, 1177225), (25, 800513), (31, 645575), (35, 571795), (49, 408425), (85, 235445), (119, 168175), (155, 129115), (175, 114359), (217, 92225), (245, 81685), (425, 47089), (527, 37975), (595, 33635), (775, 25823), (833, 24025), (961, 20825), (1085, 18445), (1225, 16337), (1519, 13175), (2635, 7595), (2975, 6727), (3689, 5425), (4165, 4805)]