8439880

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{821}}^1$

素因数の和:1089

約数の個数: 32

約数和(自身を含む): 19086840

約数和(自身を除く): 10646960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 821, 1028, 1285, 1642, 2056, 2570, 3284, 4105, 5140, 6568, 8210, 10280, 16420, 32840, 210997, 421994, 843988, 1054985, 1687976, 2109970, 4219940, 8439880]

約数ペア:

[(1, 8439880), (2, 4219940), (4, 2109970), (5, 1687976), (8, 1054985), (10, 843988), (20, 421994), (40, 210997), (257, 32840), (514, 16420), (821, 10280), (1028, 8210), (1285, 6568), (1642, 5140), (2056, 4105), (2570, 3284)]