28180215

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{653}}^1$

素因数の和:808

約数の個数: 48

約数和(自身を含む): 56317248

約数和(自身を除く): 28137033

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 137, 315, 411, 653, 685, 959, 1233, 1959, 2055, 2877, 3265, 4571, 4795, 5877, 6165, 8631, 9795, 13713, 14385, 22855, 29385, 41139, 43155, 68565, 89461, 205695, 268383, 447305, 626227, 805149, 1341915, 1878681, 3131135, 4025745, 5636043, 9393405, 28180215]

約数ペア:

[(1, 28180215), (3, 9393405), (5, 5636043), (7, 4025745), (9, 3131135), (15, 1878681), (21, 1341915), (35, 805149), (45, 626227), (63, 447305), (105, 268383), (137, 205695), (315, 89461), (411, 68565), (653, 43155), (685, 41139), (959, 29385), (1233, 22855), (1959, 14385), (2055, 13713), (2877, 9795), (3265, 8631), (4571, 6165), (4795, 5877)]