21379888

素因数分解:

$2^4\times {\mathrm{557}}^1\times {\mathrm{2399}}^1$

素因数の和:2964

約数の個数: 20

約数和(自身を含む): 41515200

約数和(自身を除く): 20135312

約数列:

[1, 2, 4, 8, 16, 557, 1114, 2228, 2399, 4456, 4798, 8912, 9596, 19192, 38384, 1336243, 2672486, 5344972, 10689944, 21379888]

約数ペア:

[(1, 21379888), (2, 10689944), (4, 5344972), (8, 2672486), (16, 1336243), (557, 38384), (1114, 19192), (2228, 9596), (2399, 8912), (4456, 4798)]