21216428

素因数分解:

$2^2\times {\mathrm{73}}^1\times {\mathrm{113}}^1\times {\mathrm{643}}^1$

素因数の和:833

約数の個数: 24

約数和(自身を含む): 38029488

約数和(自身を除く): 16813060

約数列:

[1, 2, 4, 73, 113, 146, 226, 292, 452, 643, 1286, 2572, 8249, 16498, 32996, 46939, 72659, 93878, 145318, 187756, 290636, 5304107, 10608214, 21216428]

約数ペア:

[(1, 21216428), (2, 10608214), (4, 5304107), (73, 290636), (113, 187756), (146, 145318), (226, 93878), (292, 72659), (452, 46939), (643, 32996), (1286, 16498), (2572, 8249)]