19904409

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{8539}}^1$

素因数の和:8589

約数の個数: 24

約数和(自身を含む): 33750080

約数和(自身を除く): 13845671

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 259, 333, 777, 2331, 8539, 25617, 59773, 76851, 179319, 315943, 537957, 947829, 2211601, 2843487, 6634803, 19904409]

約数ペア:

[(1, 19904409), (3, 6634803), (7, 2843487), (9, 2211601), (21, 947829), (37, 537957), (63, 315943), (111, 179319), (259, 76851), (333, 59773), (777, 25617), (2331, 8539)]