21216952

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{156007}}^1$

素因数の和:156030

約数の個数: 16

約数和(自身を含む): 42122160

約数和(自身を除く): 20905208

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 156007, 312014, 624028, 1248056, 2652119, 5304238, 10608476, 21216952]

約数ペア:

[(1, 21216952), (2, 10608476), (4, 5304238), (8, 2652119), (17, 1248056), (34, 624028), (68, 312014), (136, 156007)]