21583280

素因数分解:

$2^4\times 5^1\times {\mathrm{269791}}^1$

素因数の和:269804

約数の個数: 20

約数和(自身を含む): 50181312

約数和(自身を除く): 28598032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 269791, 539582, 1079164, 1348955, 2158328, 2697910, 4316656, 5395820, 10791640, 21583280]

約数ペア:

[(1, 21583280), (2, 10791640), (4, 5395820), (5, 4316656), (8, 2697910), (10, 2158328), (16, 1348955), (20, 1079164), (40, 539582), (80, 269791)]