21642975

素因数分解:

$3^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2237}}^1$

素因数の和:2296

約数の個数: 36

約数和(自身を含む): 39684216

約数和(自身を除く): 18041241

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 75, 129, 215, 225, 387, 645, 1075, 1935, 2237, 3225, 6711, 9675, 11185, 20133, 33555, 55925, 96191, 100665, 167775, 288573, 480955, 503325, 865719, 1442865, 2404775, 4328595, 7214325, 21642975]

約数ペア:

[(1, 21642975), (3, 7214325), (5, 4328595), (9, 2404775), (15, 1442865), (25, 865719), (43, 503325), (45, 480955), (75, 288573), (129, 167775), (215, 100665), (225, 96191), (387, 55925), (645, 33555), (1075, 20133), (1935, 11185), (2237, 9675), (3225, 6711)]