21605912

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{158867}}^1$

素因数の和:158890

約数の個数: 16

約数和(自身を含む): 42894360

約数和(自身を除く): 21288448

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 158867, 317734, 635468, 1270936, 2700739, 5401478, 10802956, 21605912]

約数ペア:

[(1, 21605912), (2, 10802956), (4, 5401478), (8, 2700739), (17, 1270936), (34, 635468), (68, 317734), (136, 158867)]