18718021

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{211}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 24422400

約数和(自身を除く): 5704379

約数列:

[1, 7, 19, 23, 29, 133, 161, 203, 211, 437, 551, 667, 1477, 3059, 3857, 4009, 4669, 4853, 6119, 12673, 28063, 33971, 42833, 88711, 92207, 116261, 140737, 645449, 813827, 985159, 2674003, 18718021]

約数ペア:

[(1, 18718021), (7, 2674003), (19, 985159), (23, 813827), (29, 645449), (133, 140737), (161, 116261), (203, 92207), (211, 88711), (437, 42833), (551, 33971), (667, 28063), (1477, 12673), (3059, 6119), (3857, 4853), (4009, 4669)]