421808

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{643}}^1$

素因数の和:692

約数の個数: 20

約数和(自身を含む): 838488

約数和(自身を除く): 416680

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 643, 656, 1286, 2572, 5144, 10288, 26363, 52726, 105452, 210904, 421808]

約数ペア:

[(1, 421808), (2, 210904), (4, 105452), (8, 52726), (16, 26363), (41, 10288), (82, 5144), (164, 2572), (328, 1286), (643, 656)]