20397867

素因数分解:

$3^1\times 7^3\times {\mathrm{43}}^1\times {\mathrm{461}}^1$

素因数の和:528

約数の個数: 32

約数和(自身を含む): 32524800

約数和(自身を除く): 12126933

約数列:

[1, 3, 7, 21, 43, 49, 129, 147, 301, 343, 461, 903, 1029, 1383, 2107, 3227, 6321, 9681, 14749, 19823, 22589, 44247, 59469, 67767, 138761, 158123, 416283, 474369, 971327, 2913981, 6799289, 20397867]

約数ペア:

[(1, 20397867), (3, 6799289), (7, 2913981), (21, 971327), (43, 474369), (49, 416283), (129, 158123), (147, 138761), (301, 67767), (343, 59469), (461, 44247), (903, 22589), (1029, 19823), (1383, 14749), (2107, 9681), (3227, 6321)]