19903779

素因数分解:

$3^3\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1987}}^1$

素因数の和:2056

約数の個数: 32

約数和(自身を含む): 34352640

約数和(自身を除く): 14448861

約数列:

[1, 3, 7, 9, 21, 27, 53, 63, 159, 189, 371, 477, 1113, 1431, 1987, 3339, 5961, 10017, 13909, 17883, 41727, 53649, 105311, 125181, 315933, 375543, 737177, 947799, 2211531, 2843397, 6634593, 19903779]

約数ペア:

[(1, 19903779), (3, 6634593), (7, 2843397), (9, 2211531), (21, 947799), (27, 737177), (53, 375543), (63, 315933), (159, 125181), (189, 105311), (371, 53649), (477, 41727), (1113, 17883), (1431, 13909), (1987, 10017), (3339, 5961)]