20716479

素因数分解:

$3^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{641}}^1$

素因数の和:682

約数の個数: 48

約数和(自身を含む): 37390080

約数和(自身を除く): 16673601

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 243, 399, 513, 567, 641, 1197, 1539, 1701, 1923, 3591, 4487, 4617, 5769, 10773, 12179, 13461, 17307, 32319, 36537, 40383, 51921, 85253, 109611, 121149, 155763, 255759, 328833, 363447, 767277, 986499, 1090341, 2301831, 2959497, 6905493, 20716479]

約数ペア:

[(1, 20716479), (3, 6905493), (7, 2959497), (9, 2301831), (19, 1090341), (21, 986499), (27, 767277), (57, 363447), (63, 328833), (81, 255759), (133, 155763), (171, 121149), (189, 109611), (243, 85253), (399, 51921), (513, 40383), (567, 36537), (641, 32319), (1197, 17307), (1539, 13461), (1701, 12179), (1923, 10773), (3591, 5769), (4487, 4617)]