21389120

素因数分解:

$2^6\times 5^1\times {\mathrm{66841}}^1$

素因数の和:66858

約数の個数: 28

約数和(自身を含む): 50933604

約数和(自身を除く): 29544484

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 66841, 133682, 267364, 334205, 534728, 668410, 1069456, 1336820, 2138912, 2673640, 4277824, 5347280, 10694560, 21389120]

約数ペア:

[(1, 21389120), (2, 10694560), (4, 5347280), (5, 4277824), (8, 2673640), (10, 2138912), (16, 1336820), (20, 1069456), (32, 668410), (40, 534728), (64, 334205), (80, 267364), (160, 133682), (320, 66841)]