20406057

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{257}}^1$

素因数の和:485

約数の個数: 32

約数和(自身を含む): 33024000

約数和(自身を除く): 12617943

約数列:

[1, 3, 7, 19, 21, 57, 133, 199, 257, 399, 597, 771, 1393, 1799, 3781, 4179, 4883, 5397, 11343, 14649, 26467, 34181, 51143, 79401, 102543, 153429, 358001, 971717, 1074003, 2915151, 6802019, 20406057]

約数ペア:

[(1, 20406057), (3, 6802019), (7, 2915151), (19, 1074003), (21, 971717), (57, 358001), (133, 153429), (199, 102543), (257, 79401), (399, 51143), (597, 34181), (771, 26467), (1393, 14649), (1799, 11343), (3781, 5397), (4179, 4883)]