20209904

素因数分解:

$2^4\times {\mathrm{11}}^3\times {\mathrm{13}}^1\times {\mathrm{73}}^1$

素因数の和:127

約数の個数: 80

約数和(自身を含む): 47017824

約数和(自身を除く): 26807920

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 44, 52, 73, 88, 104, 121, 143, 146, 176, 208, 242, 286, 292, 484, 572, 584, 803, 949, 968, 1144, 1168, 1331, 1573, 1606, 1898, 1936, 2288, 2662, 3146, 3212, 3796, 5324, 6292, 6424, 7592, 8833, 10439, 10648, 12584, 12848, 15184, 17303, 17666, 20878, 21296, 25168, 34606, 35332, 41756, 69212, 70664, 83512, 97163, 114829, 138424, 141328, 167024, 194326, 229658, 276848, 388652, 459316, 777304, 918632, 1263119, 1554608, 1837264, 2526238, 5052476, 10104952, 20209904]

約数ペア:

[(1, 20209904), (2, 10104952), (4, 5052476), (8, 2526238), (11, 1837264), (13, 1554608), (16, 1263119), (22, 918632), (26, 777304), (44, 459316), (52, 388652), (73, 276848), (88, 229658), (104, 194326), (121, 167024), (143, 141328), (146, 138424), (176, 114829), (208, 97163), (242, 83512), (286, 70664), (292, 69212), (484, 41756), (572, 35332), (584, 34606), (803, 25168), (949, 21296), (968, 20878), (1144, 17666), (1168, 17303), (1331, 15184), (1573, 12848), (1606, 12584), (1898, 10648), (1936, 10439), (2288, 8833), (2662, 7592), (3146, 6424), (3212, 6292), (3796, 5324)]