81921560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{292577}}^1$

素因数の和:292595

約数の個数: 32

約数和(自身を含む): 210656160

約数和(自身を除く): 128734600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 292577, 585154, 1170308, 1462885, 2048039, 2340616, 2925770, 4096078, 5851540, 8192156, 10240195, 11703080, 16384312, 20480390, 40960780, 81921560]

約数ペア:

[(1, 81921560), (2, 40960780), (4, 20480390), (5, 16384312), (7, 11703080), (8, 10240195), (10, 8192156), (14, 5851540), (20, 4096078), (28, 2925770), (35, 2340616), (40, 2048039), (56, 1462885), (70, 1170308), (140, 585154), (280, 292577)]