21386128

素因数分解:

$2^4\times {\mathrm{47}}^1\times {\mathrm{28439}}^1$

素因数の和:28494

約数の個数: 20

約数和(自身を含む): 42318720

約数和(自身を除く): 20932592

約数列:

[1, 2, 4, 8, 16, 47, 94, 188, 376, 752, 28439, 56878, 113756, 227512, 455024, 1336633, 2673266, 5346532, 10693064, 21386128]

約数ペア:

[(1, 21386128), (2, 10693064), (4, 5346532), (8, 2673266), (16, 1336633), (47, 455024), (94, 227512), (188, 113756), (376, 56878), (752, 28439)]