20501800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{9319}}^1$

素因数の和:9346

約数の個数: 48

約数和(自身を含む): 52005600

約数和(自身を除く): 31503800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 200, 220, 275, 440, 550, 1100, 2200, 9319, 18638, 37276, 46595, 74552, 93190, 102509, 186380, 205018, 232975, 372760, 410036, 465950, 512545, 820072, 931900, 1025090, 1863800, 2050180, 2562725, 4100360, 5125450, 10250900, 20501800]

約数ペア:

[(1, 20501800), (2, 10250900), (4, 5125450), (5, 4100360), (8, 2562725), (10, 2050180), (11, 1863800), (20, 1025090), (22, 931900), (25, 820072), (40, 512545), (44, 465950), (50, 410036), (55, 372760), (88, 232975), (100, 205018), (110, 186380), (200, 102509), (220, 93190), (275, 74552), (440, 46595), (550, 37276), (1100, 18638), (2200, 9319)]