21045475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{743}}^1$

素因数の和:867

約数の個数: 24

約数和(自身を含む): 28783872

約数和(自身を除く): 7738397

約数列:

[1, 5, 11, 25, 55, 103, 275, 515, 743, 1133, 2575, 3715, 5665, 8173, 18575, 28325, 40865, 76529, 204325, 382645, 841819, 1913225, 4209095, 21045475]

約数ペア:

[(1, 21045475), (5, 4209095), (11, 1913225), (25, 841819), (55, 382645), (103, 204325), (275, 76529), (515, 40865), (743, 28325), (1133, 18575), (2575, 8173), (3715, 5665)]