819760

素因数分解:

$2^4\times 5^1\times {\mathrm{10247}}^1$

素因数の和:10260

約数の個数: 20

約数和(自身を含む): 1906128

約数和(自身を除く): 1086368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 10247, 20494, 40988, 51235, 81976, 102470, 163952, 204940, 409880, 819760]

約数ペア:

[(1, 819760), (2, 409880), (4, 204940), (5, 163952), (8, 102470), (10, 81976), (16, 51235), (20, 40988), (40, 20494), (80, 10247)]