19989844

素因数分解:

$2^2\times 7^2\times {\mathrm{79}}^1\times {\mathrm{1291}}^1$

素因数の和:1388

約数の個数: 36

約数和(自身を含む): 41240640

約数和(自身を除く): 21250796

約数列:

[1, 2, 4, 7, 14, 28, 49, 79, 98, 158, 196, 316, 553, 1106, 1291, 2212, 2582, 3871, 5164, 7742, 9037, 15484, 18074, 36148, 63259, 101989, 126518, 203978, 253036, 407956, 713923, 1427846, 2855692, 4997461, 9994922, 19989844]

約数ペア:

[(1, 19989844), (2, 9994922), (4, 4997461), (7, 2855692), (14, 1427846), (28, 713923), (49, 407956), (79, 253036), (98, 203978), (158, 126518), (196, 101989), (316, 63259), (553, 36148), (1106, 18074), (1291, 15484), (2212, 9037), (2582, 7742), (3871, 5164)]