19997956

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{1259}}^1$

素因数の和:1312

約数の個数: 36

約数和(自身を含む): 40325040

約数和(自身を除く): 20327084

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 76, 209, 361, 418, 722, 836, 1259, 1444, 2518, 3971, 5036, 7942, 13849, 15884, 23921, 27698, 47842, 55396, 95684, 263131, 454499, 526262, 908998, 1052524, 1817996, 4999489, 9998978, 19997956]

約数ペア:

[(1, 19997956), (2, 9998978), (4, 4999489), (11, 1817996), (19, 1052524), (22, 908998), (38, 526262), (44, 454499), (76, 263131), (209, 95684), (361, 55396), (418, 47842), (722, 27698), (836, 23921), (1259, 15884), (1444, 13849), (2518, 7942), (3971, 5036)]