20685184

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{401}}^1$

素因数の和:459

約数の個数: 64

約数和(自身を含む): 45924480

約数和(自身を除く): 25239296

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 32, 52, 62, 64, 104, 124, 128, 208, 248, 401, 403, 416, 496, 802, 806, 832, 992, 1604, 1612, 1664, 1984, 3208, 3224, 3968, 5213, 6416, 6448, 10426, 12431, 12832, 12896, 20852, 24862, 25664, 25792, 41704, 49724, 51328, 51584, 83408, 99448, 161603, 166816, 198896, 323206, 333632, 397792, 646412, 667264, 795584, 1292824, 1591168, 2585648, 5171296, 10342592, 20685184]

約数ペア:

[(1, 20685184), (2, 10342592), (4, 5171296), (8, 2585648), (13, 1591168), (16, 1292824), (26, 795584), (31, 667264), (32, 646412), (52, 397792), (62, 333632), (64, 323206), (104, 198896), (124, 166816), (128, 161603), (208, 99448), (248, 83408), (401, 51584), (403, 51328), (416, 49724), (496, 41704), (802, 25792), (806, 25664), (832, 24862), (992, 20852), (1604, 12896), (1612, 12832), (1664, 12431), (1984, 10426), (3208, 6448), (3224, 6416), (3968, 5213)]