19781557

素因数分解:

${\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{281}}^1$

素因数の和:440

約数の個数: 16

約数和(自身を含む): 21745584

約数和(自身を除く): 1964027

約数列:

[1, 17, 41, 101, 281, 697, 1717, 4141, 4777, 11521, 28381, 70397, 195857, 482477, 1163621, 19781557]

約数ペア:

[(1, 19781557), (17, 1163621), (41, 482477), (101, 195857), (281, 70397), (697, 28381), (1717, 11521), (4141, 4777)]