20659919

素因数分解:

$7^3\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1$

素因数の和:148

約数の個数: 32

約数和(自身を含む): 26112000

約数和(自身を除く): 5452081

約数列:

[1, 7, 29, 31, 49, 67, 203, 217, 343, 469, 899, 1421, 1519, 1943, 2077, 3283, 6293, 9947, 10633, 13601, 14539, 22981, 44051, 60233, 95207, 101773, 308357, 421631, 666449, 712411, 2951417, 20659919]

約数ペア:

[(1, 20659919), (7, 2951417), (29, 712411), (31, 666449), (49, 421631), (67, 308357), (203, 101773), (217, 95207), (343, 60233), (469, 44051), (899, 22981), (1421, 14539), (1519, 13601), (1943, 10633), (2077, 9947), (3283, 6293)]