20728862

素因数分解:

$2^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:142

約数の個数: 64

約数和(自身を含む): 41126400

約数和(自身を除く): 20397538

約数列:

[1, 2, 7, 11, 14, 22, 41, 49, 67, 77, 82, 98, 134, 154, 287, 343, 451, 469, 539, 574, 686, 737, 902, 938, 1078, 1474, 2009, 2747, 3157, 3283, 3773, 4018, 5159, 5494, 6314, 6566, 7546, 10318, 14063, 19229, 22099, 22981, 28126, 30217, 36113, 38458, 44198, 45962, 60434, 72226, 134603, 154693, 211519, 252791, 269206, 309386, 423038, 505582, 942221, 1480633, 1884442, 2961266, 10364431, 20728862]

約数ペア:

[(1, 20728862), (2, 10364431), (7, 2961266), (11, 1884442), (14, 1480633), (22, 942221), (41, 505582), (49, 423038), (67, 309386), (77, 269206), (82, 252791), (98, 211519), (134, 154693), (154, 134603), (287, 72226), (343, 60434), (451, 45962), (469, 44198), (539, 38458), (574, 36113), (686, 30217), (737, 28126), (902, 22981), (938, 22099), (1078, 19229), (1474, 14063), (2009, 10318), (2747, 7546), (3157, 6566), (3283, 6314), (3773, 5494), (4018, 5159)]