16921191

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{42409}}^1$

素因数の和:42438

約数の個数: 16

約数和(自身を含む): 27142400

約数和(自身を除く): 10221209

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 42409, 127227, 296863, 805771, 890589, 2417313, 5640397, 16921191]

約数ペア:

[(1, 16921191), (3, 5640397), (7, 2417313), (19, 890589), (21, 805771), (57, 296863), (133, 127227), (399, 42409)]