21639492

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1997}}^1$

素因数の和:2057

約数の個数: 72

約数和(自身を含む): 63999936

約数和(自身を除く): 42360444

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 43, 63, 84, 86, 126, 129, 172, 252, 258, 301, 387, 516, 602, 774, 903, 1204, 1548, 1806, 1997, 2709, 3612, 3994, 5418, 5991, 7988, 10836, 11982, 13979, 17973, 23964, 27958, 35946, 41937, 55916, 71892, 83874, 85871, 125811, 167748, 171742, 251622, 257613, 343484, 503244, 515226, 601097, 772839, 1030452, 1202194, 1545678, 1803291, 2404388, 3091356, 3606582, 5409873, 7213164, 10819746, 21639492]

約数ペア:

[(1, 21639492), (2, 10819746), (3, 7213164), (4, 5409873), (6, 3606582), (7, 3091356), (9, 2404388), (12, 1803291), (14, 1545678), (18, 1202194), (21, 1030452), (28, 772839), (36, 601097), (42, 515226), (43, 503244), (63, 343484), (84, 257613), (86, 251622), (126, 171742), (129, 167748), (172, 125811), (252, 85871), (258, 83874), (301, 71892), (387, 55916), (516, 41937), (602, 35946), (774, 27958), (903, 23964), (1204, 17973), (1548, 13979), (1806, 11982), (1997, 10836), (2709, 7988), (3612, 5991), (3994, 5418)]