20826575

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{349}}^1$

素因数の和:408

約数の個数: 48

約数和(自身を含む): 33331200

約数和(自身を除く): 12504625

約数列:

[1, 5, 7, 11, 25, 31, 35, 55, 77, 155, 175, 217, 275, 341, 349, 385, 775, 1085, 1705, 1745, 1925, 2387, 2443, 3839, 5425, 8525, 8725, 10819, 11935, 12215, 19195, 26873, 54095, 59675, 61075, 75733, 95975, 119009, 134365, 270475, 378665, 595045, 671825, 833063, 1893325, 2975225, 4165315, 20826575]

約数ペア:

[(1, 20826575), (5, 4165315), (7, 2975225), (11, 1893325), (25, 833063), (31, 671825), (35, 595045), (55, 378665), (77, 270475), (155, 134365), (175, 119009), (217, 95975), (275, 75733), (341, 61075), (349, 59675), (385, 54095), (775, 26873), (1085, 19195), (1705, 12215), (1745, 11935), (1925, 10819), (2387, 8725), (2443, 8525), (3839, 5425)]