20917281

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:202

約数の個数: 64

約数和(自身を含む): 37748736

約数和(自身を除く): 16831455

約数列:

[1, 3, 7, 11, 21, 23, 31, 33, 69, 77, 93, 127, 161, 217, 231, 253, 341, 381, 483, 651, 713, 759, 889, 1023, 1397, 1771, 2139, 2387, 2667, 2921, 3937, 4191, 4991, 5313, 7161, 7843, 8763, 9779, 11811, 14973, 20447, 23529, 27559, 29337, 32131, 43307, 54901, 61341, 82677, 90551, 96393, 129921, 164703, 224917, 271653, 303149, 633857, 674751, 909447, 996061, 1901571, 2988183, 6972427, 20917281]

約数ペア:

[(1, 20917281), (3, 6972427), (7, 2988183), (11, 1901571), (21, 996061), (23, 909447), (31, 674751), (33, 633857), (69, 303149), (77, 271653), (93, 224917), (127, 164703), (161, 129921), (217, 96393), (231, 90551), (253, 82677), (341, 61341), (381, 54901), (483, 43307), (651, 32131), (713, 29337), (759, 27559), (889, 23529), (1023, 20447), (1397, 14973), (1771, 11811), (2139, 9779), (2387, 8763), (2667, 7843), (2921, 7161), (3937, 5313), (4191, 4991)]