19912016

素因数分解:

$2^4\times {\mathrm{1244501}}^1$

素因数の和:1244509

約数の個数: 10

約数和(自身を含む): 38579562

約数和(自身を除く): 18667546

約数列:

[1, 2, 4, 8, 16, 1244501, 2489002, 4978004, 9956008, 19912016]

約数ペア:

[(1, 19912016), (2, 9956008), (4, 4978004), (8, 2489002), (16, 1244501)]