18821988

素因数分解:

$2^2\times 3^2\times {\mathrm{251}}^1\times {\mathrm{2083}}^1$

素因数の和:2344

約数の個数: 36

約数和(自身を含む): 47790288

約数和(自身を除く): 28968300

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 251, 502, 753, 1004, 1506, 2083, 2259, 3012, 4166, 4518, 6249, 8332, 9036, 12498, 18747, 24996, 37494, 74988, 522833, 1045666, 1568499, 2091332, 3136998, 4705497, 6273996, 9410994, 18821988]

約数ペア:

[(1, 18821988), (2, 9410994), (3, 6273996), (4, 4705497), (6, 3136998), (9, 2091332), (12, 1568499), (18, 1045666), (36, 522833), (251, 74988), (502, 37494), (753, 24996), (1004, 18747), (1506, 12498), (2083, 9036), (2259, 8332), (3012, 6249), (4166, 4518)]