21053740

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{1237}}^1$

素因数の和:1306

約数の個数: 48

約数和(自身を含む): 47420352

約数和(自身を除く): 26366612

約数列:

[1, 2, 4, 5, 10, 20, 23, 37, 46, 74, 92, 115, 148, 185, 230, 370, 460, 740, 851, 1237, 1702, 2474, 3404, 4255, 4948, 6185, 8510, 12370, 17020, 24740, 28451, 45769, 56902, 91538, 113804, 142255, 183076, 228845, 284510, 457690, 569020, 915380, 1052687, 2105374, 4210748, 5263435, 10526870, 21053740]

約数ペア:

[(1, 21053740), (2, 10526870), (4, 5263435), (5, 4210748), (10, 2105374), (20, 1052687), (23, 915380), (37, 569020), (46, 457690), (74, 284510), (92, 228845), (115, 183076), (148, 142255), (185, 113804), (230, 91538), (370, 56902), (460, 45769), (740, 28451), (851, 24740), (1237, 17020), (1702, 12370), (2474, 8510), (3404, 6185), (4255, 4948)]