21603800

素因数分解:

$2^3\times 5^2\times {\mathrm{109}}^1\times {\mathrm{991}}^1$

素因数の和:1116

約数の個数: 48

約数和(自身を含む): 50740800

約数和(自身を除く): 29137000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 109, 200, 218, 436, 545, 872, 991, 1090, 1982, 2180, 2725, 3964, 4360, 4955, 5450, 7928, 9910, 10900, 19820, 21800, 24775, 39640, 49550, 99100, 108019, 198200, 216038, 432076, 540095, 864152, 1080190, 2160380, 2700475, 4320760, 5400950, 10801900, 21603800]

約数ペア:

[(1, 21603800), (2, 10801900), (4, 5400950), (5, 4320760), (8, 2700475), (10, 2160380), (20, 1080190), (25, 864152), (40, 540095), (50, 432076), (100, 216038), (109, 198200), (200, 108019), (218, 99100), (436, 49550), (545, 39640), (872, 24775), (991, 21800), (1090, 19820), (1982, 10900), (2180, 9910), (2725, 7928), (3964, 5450), (4360, 4955)]