20845825

素因数分解:

$5^2\times 7^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1$

素因数の和:72

約数の個数: 96

約数和(自身を含む): 37497600

約数和(自身を除く): 16651775

約数列:

[1, 5, 7, 11, 13, 17, 25, 35, 49, 55, 65, 77, 85, 91, 119, 143, 175, 187, 221, 245, 275, 325, 343, 385, 425, 455, 539, 595, 637, 715, 833, 935, 1001, 1105, 1225, 1309, 1547, 1715, 1925, 2275, 2431, 2695, 2975, 3185, 3575, 3773, 4165, 4459, 4675, 5005, 5525, 5831, 6545, 7007, 7735, 8575, 9163, 10829, 12155, 13475, 15925, 17017, 18865, 20825, 22295, 25025, 29155, 32725, 35035, 38675, 45815, 49049, 54145, 60775, 64141, 75803, 85085, 94325, 111475, 119119, 145775, 175175, 229075, 245245, 270725, 320705, 379015, 425425, 595595, 833833, 1226225, 1603525, 1895075, 2977975, 4169165, 20845825]

約数ペア:

[(1, 20845825), (5, 4169165), (7, 2977975), (11, 1895075), (13, 1603525), (17, 1226225), (25, 833833), (35, 595595), (49, 425425), (55, 379015), (65, 320705), (77, 270725), (85, 245245), (91, 229075), (119, 175175), (143, 145775), (175, 119119), (187, 111475), (221, 94325), (245, 85085), (275, 75803), (325, 64141), (343, 60775), (385, 54145), (425, 49049), (455, 45815), (539, 38675), (595, 35035), (637, 32725), (715, 29155), (833, 25025), (935, 22295), (1001, 20825), (1105, 18865), (1225, 17017), (1309, 15925), (1547, 13475), (1715, 12155), (1925, 10829), (2275, 9163), (2431, 8575), (2695, 7735), (2975, 7007), (3185, 6545), (3575, 5831), (3773, 5525), (4165, 5005), (4459, 4675)]