4219940

素因数分解:

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

素因数の和:1087

約数の個数: 24

約数和(自身を含む): 8907192

約数和(自身を除く): 4687252

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 821, 1028, 1285, 1642, 2570, 3284, 4105, 5140, 8210, 16420, 210997, 421994, 843988, 1054985, 2109970, 4219940]

約数ペア:

[(1, 4219940), (2, 2109970), (4, 1054985), (5, 843988), (10, 421994), (20, 210997), (257, 16420), (514, 8210), (821, 5140), (1028, 4105), (1285, 3284), (1642, 2570)]