19978105

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{18413}}^1$

素因数の和:18456

約数の個数: 16

約数和(自身を含む): 28283904

約数和(自身を除く): 8305799

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 18413, 92065, 128891, 570803, 644455, 2854015, 3995621, 19978105]

約数ペア:

[(1, 19978105), (5, 3995621), (7, 2854015), (31, 644455), (35, 570803), (155, 128891), (217, 92065), (1085, 18413)]