20484261

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 36150400

約数和(自身を除く): 15666139

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 109, 133, 157, 171, 327, 399, 471, 763, 981, 1099, 1197, 1413, 2071, 2289, 2983, 3297, 6213, 6867, 8949, 9891, 14497, 17113, 18639, 20881, 26847, 43491, 51339, 62643, 119791, 130473, 154017, 187929, 325147, 359373, 975441, 1078119, 2276029, 2926323, 6828087, 20484261]

約数ペア:

[(1, 20484261), (3, 6828087), (7, 2926323), (9, 2276029), (19, 1078119), (21, 975441), (57, 359373), (63, 325147), (109, 187929), (133, 154017), (157, 130473), (171, 119791), (327, 62643), (399, 51339), (471, 43491), (763, 26847), (981, 20881), (1099, 18639), (1197, 17113), (1413, 14497), (2071, 9891), (2289, 8949), (2983, 6867), (3297, 6213)]