19991097

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^2\times {\mathrm{293}}^1$

素因数の和:347

約数の個数: 48

約数和(自身を含む): 35844480

約数和(自身を除く): 15853383

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 133, 171, 189, 293, 361, 399, 513, 879, 1083, 1197, 2051, 2527, 2637, 3249, 3591, 5567, 6153, 7581, 7911, 9747, 16701, 18459, 22743, 38969, 50103, 55377, 68229, 105773, 116907, 150309, 317319, 350721, 740411, 951957, 1052163, 2221233, 2855871, 6663699, 19991097]

約数ペア:

[(1, 19991097), (3, 6663699), (7, 2855871), (9, 2221233), (19, 1052163), (21, 951957), (27, 740411), (57, 350721), (63, 317319), (133, 150309), (171, 116907), (189, 105773), (293, 68229), (361, 55377), (399, 50103), (513, 38969), (879, 22743), (1083, 18459), (1197, 16701), (2051, 9747), (2527, 7911), (2637, 7581), (3249, 6153), (3591, 5567)]