21509913

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{11399}}^1$

素因数の和:11456

約数の個数: 16

約数和(自身を含む): 31190400

約数和(自身を除く): 9680487

約数列:

[1, 3, 17, 37, 51, 111, 629, 1887, 11399, 34197, 193783, 421763, 581349, 1265289, 7169971, 21509913]

約数ペア:

[(1, 21509913), (3, 7169971), (17, 1265289), (37, 581349), (51, 421763), (111, 193783), (629, 34197), (1887, 11399)]