12780355

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:259

約数の個数: 32

約数和(自身を含む): 18385920

約数和(自身を除く): 5605565

約数列:

[1, 5, 7, 35, 37, 71, 139, 185, 259, 355, 497, 695, 973, 1295, 2485, 2627, 4865, 5143, 9869, 13135, 18389, 25715, 36001, 49345, 69083, 91945, 180005, 345415, 365153, 1825765, 2556071, 12780355]

約数ペア:

[(1, 12780355), (5, 2556071), (7, 1825765), (35, 365153), (37, 345415), (71, 180005), (139, 91945), (185, 69083), (259, 49345), (355, 36001), (497, 25715), (695, 18389), (973, 13135), (1295, 9869), (2485, 5143), (2627, 4865)]