21048975

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{5503}}^1$

素因数の和:5536

約数の個数: 36

約数和(自身を含む): 39926016

約数和(自身を除く): 18877041

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 153, 225, 255, 425, 765, 1275, 3825, 5503, 16509, 27515, 49527, 82545, 93551, 137575, 247635, 280653, 412725, 467755, 841959, 1238175, 1403265, 2338775, 4209795, 7016325, 21048975]

約数ペア:

[(1, 21048975), (3, 7016325), (5, 4209795), (9, 2338775), (15, 1403265), (17, 1238175), (25, 841959), (45, 467755), (51, 412725), (75, 280653), (85, 247635), (153, 137575), (225, 93551), (255, 82545), (425, 49527), (765, 27515), (1275, 16509), (3825, 5503)]