20991688

素因数分解:

$2^3\times {\mathrm{107}}^1\times {\mathrm{137}}^1\times {\mathrm{179}}^1$

素因数の和:429

約数の個数: 32

約数和(自身を含む): 40240800

約数和(自身を除く): 19249112

約数列:

[1, 2, 4, 8, 107, 137, 179, 214, 274, 358, 428, 548, 716, 856, 1096, 1432, 14659, 19153, 24523, 29318, 38306, 49046, 58636, 76612, 98092, 117272, 153224, 196184, 2623961, 5247922, 10495844, 20991688]

約数ペア:

[(1, 20991688), (2, 10495844), (4, 5247922), (8, 2623961), (107, 196184), (137, 153224), (179, 117272), (214, 98092), (274, 76612), (358, 58636), (428, 49046), (548, 38306), (716, 29318), (856, 24523), (1096, 19153), (1432, 14659)]