20899935

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1543}}^1$

素因数の和:1604

約数の個数: 48

約数和(自身を含む): 42392064

約数和(自身を除く): 21492129

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 43, 45, 63, 105, 129, 215, 301, 315, 387, 645, 903, 1505, 1543, 1935, 2709, 4515, 4629, 7715, 10801, 13545, 13887, 23145, 32403, 54005, 66349, 69435, 97209, 162015, 199047, 331745, 464443, 486045, 597141, 995235, 1393329, 2322215, 2985705, 4179987, 6966645, 20899935]

約数ペア:

[(1, 20899935), (3, 6966645), (5, 4179987), (7, 2985705), (9, 2322215), (15, 1393329), (21, 995235), (35, 597141), (43, 486045), (45, 464443), (63, 331745), (105, 199047), (129, 162015), (215, 97209), (301, 69435), (315, 66349), (387, 54005), (645, 32403), (903, 23145), (1505, 13887), (1543, 13545), (1935, 10801), (2709, 7715), (4515, 4629)]